			How to Use Oleo

This is all the documentation there is at the moment.  I hope that this
documentation is complete, (if not readable), but there may be omissions.
Use the Source, and be sure to send me mail about anything you find unclear.

Oleo currently runs under 4.3BSD, HP-UX 7.0, and MS-DOS (3.3 with Turbo C 2.0).
It should work on a SysV system, but may need some tweaking.  (I don't have
easy access to SysV machines, so it does not get well tested on them.)

Oleo uses curses under BSD and SysV, and requires that standout mode be
reverse-video, or some other mode where standout blanks are visually
distinguishable from non-standout blanks.  (If this is not the case, you will
have a hard time telling where the cell cursor is.)  (Modifying it to
try to explicitly use reverse-video on SysV machines should not be too hard.
I'd appreciate it if someone would send me the patch to do that.)

Detailed instructions for compiling and installing oleo are in the file
INSTALL.

Send bug reports, comments, patches, etc to hack@gnu.ai.mit.edu

This document probably assumes you know a fair amount about how spreadsheets
work.  Please let me know which parts should be clarified, and what new
sections should be added.


		Cell references:

Case of cell and range letters is ignored.  Lowercase letters in cell and
range letters are silently turned into their uppercase equivelents.

	Absolute vs Relative references:

A reference to a cell may be either absolute or relative.  The only
difference between them (besides how they are printed) is how they are
adjusted when a cell is moved or copied.

When an expression containing an absolute reference is moved or copied, the
reference will still point to the same cell.

When an expression containing a relative reference is moved or copied, the
reference is changed to point to the cell at the same offset from the
reference's new position.

So if the expression 'R[+1]C[+1]' is in cell R8C9 it refers to cell R9C10.
If the same expression is copied into cell R1C1 it will refer to R2C2.

	With -DA0_REFS:

Relative cell reference have the form {col_let}{row_num}, as in A1 (the
topleft cell in the sheet).
		
Absolute ones have the form ${col_let}${row_num}, as in $A$1 (The topleft
cell in the sheet).

Mixed-mode ones work about the way you'd expect, with $A1 having an absolute
column, but a relative row. . .

Ranges are either {cell_ref}:{cell_ref} or {cell_ref}.{cell_ref}, where the
cell_refs describe opposite corners of the range.  So A1:B2 is the topmost,
leftmost four cells in the spreadsheet.

Mixed mode rangers work, and have the syntax you'd expect.

	Without -DA0_REFS: (the default)

Absolute cell references have the form R{row_num}C{col_num}, as in R1C1 (the
topleft cell in the sheet).

Relative ones have the form R[{offset}]C[{offset}], as in R[-1]C[+1] (The
cell above and to the right of the current cell).  An offset of zero, can be
deleted, along with its square-brackets, as in RC[+1] (the cell to the right
of the current cell.)

Mixed-mode references also work about the same as you'd
expect, as in R4C[-1] (the cell in row four that's one left
of the current cell.)

Ranges are of the form R{row1}:{row2}C{col1}:{col2}, where the row and column
references may be either absolute or relative.  If {row2}=={row1} or
{col2}=={col1}, the colon and the redundant number may be omitted, as in
R1:10c2 (Rows one through ten in column two).

Mixed-mode rangers work, and have the syntax you'd expect, as in R2:[-1]c3.


		Keymaps:

Oleo normally has five keymaps.  They are:
	main	The main command loop.
	meta	The main command loop commands that are prefixed with
		ESCape.
	edit	Reading input text.
	edit-meta Input text commands that are prefixed with ESCape.
	ansi	The ansi arrow keys.
	digit	Reading in a number to repeat a command.

Keymaps may have a 'default map'.  If a key is pressed which does not have an
assigned meaning in that map, the map's default map is checked, and that
map's default map, until a command is found or there are no more default maps
to scan.

The edit map defaults to the main map, and the edit-meta map defaults to the
meta map.


		Input Editing:

When the spreadsheet is reading text input, you can use a few text-editing
commands.  (Oleo doesn't currently use the readline() library; It may later,
when the readline library has a better programmer and display interface.)
Note that there in no history mechanism and no yank command.  If you
accidentally ^U your text, it is *gone*.

The following editing commands are defined:

Name:		Key:	What it does:

M-A	insert-abs-ref		Insert/over-write an absolute reference to the
				current cell/region.
M-R	insert-rel-ref		Insert/over-write a relative reference to the
				current cell/region.
M-E	insert-cell-expression	Insert/over-write the expression in the
				current cell.
M-V	insert-cell-value	Insert/over-write the value of the current
				cell.
^A	cursor-begin-line	Move the cursor to the beginning of the text.
^B	cursor-back-char	Move the cursor back a character.
M-B	cursor-back-word	Move back a word.
^D	delete-next-char	Delete the character under the cursor.
M-D	delete-next-word	Delete from the cursor to the end of
				the current word.
^E	cursor-end-line		Move to the end of the text.
^F	cursor-fwd-charF	Move forward a character.
M-F	cursor-fwd-word		Move forward a word.
^H  ^?	delete-prev-char	Delete the character to the left of the cursor.
^J  ^M	finish-line		Finish editing the text, and execute the
				command you've been typing the text in for.
^K	delete-to-end		Delete from the cursor to the end of the text.
M-O	toggle-over-write	Toggle between overwrite and insert mode.
^U  ^X	delete-to-start		(BEWARE!) Deletes from the cursor to the
				beginning of the line.
^W	delete-prev-word	Delete the word to the left of the cursor.
' ' to ~ self-insert		These characters are either inserted or
				over-written into the text.

		Input Defaults:

Almost all editing commands remember what you typed the last time you used
that command, and start you up editing a copy of that text.  If you want to
type in something completely new, just type ^X (or ^U) and type in your new
text.

		Horizontal scrolling:

Since formula, etc may easily be longer than the width of the screen, oleo
automatically uses horizontal scrolling whenever the cursor would get too
near to either end of the screen.


			Error Messages:

Error messages are displayed on the input line.  If oleo needs to display
more than one error message at a time, it will display [MORE] at the end of
the first msg, and will wait for you to type a key before displaying the next
one.  Oleo will also display the [MORE] message if you are entering text in
the input line, so that you will be able to see the error message.  Oleo may
still sometimes clear the screen before you can read an error message.  This
is probably a bug.

			Info Messages:

Some commands (like format-cell) occasionally display non-error information.
If the status line is enabled, the message is displayed there, and subsequent
non-error messages will over-write them without [MORE] prompting.  This in
quite useful if the msg in question concerns how far oleo has gotten through
some task (like reading a file).  If the status line is disabled, the
messages are displayed in the input line.

			The Main Commands:

Key	Command Name		What it does
h  ^B	go-left		These commands move the cell-cursor one cell
j  ^N	go-down		in the appropriate direction.  
k  ^P	go-up
l  ^F	go-right
y	go-upleft
u	go-upright
b	go-downleft
n	go-downright

H	scroll-left		These scroll the current window one screenful
J	scroll-down		in the appropriate direction.  They try to
K	scroll-up		leave the cell cursor in (roughly the same
L	scroll-right		place in the window, so that an L followed by
Y	scroll-upleft		an H will leave the cell cursor back in the
U	scroll-upright		original cell, however, since the number of
B	scroll-downleft		rows and columns in each screenful varies,
N	scroll-downright	this will not always work.

M-H	scan-left	These commands move to the first/last nonempty cell in
M-J	scan-down	the current row/column.  If given a repeat count, they
M-K	scan-up		go to the N-th most nonempty cell.  If there are no
M-L	scan-right	cells, the cursor is moved to the leftmost/top cell.

^G	break	This will abort a partially completed command.  If you are
		typing text on the top line, the text you typed will be saved
		and presented as the default the next time you start that
		command.

^L	recenter-window		This redraws the screen.  If the page option
		is not set in this window, it will try to move the current
		cell to the center of the window.  If the page option is set,
		this will just redraw the screen.

o	set-option	This asks for an option to set or reset, and tries to
		do so.


d	set-defaults	This command will change the default alignment, format,
		protection, or width.  If the status-line is enabled,
		this will display the current settings there.

Q	quit	This command exits the spreadsheet and returns you to the
		shell.  This may ask for confirmation if oleo thinks you have
		unsaved changes.  If you do not save your changes before
		quitting, they will be lost forever.

^R	redraw-screen	This redraws the screen.  It is most useful if
		line-noise or another program has scribbled on your display.
				

M-U	set-user-format		Set a user-defined format.

v	set-variable	This prompts you for a name followed by a cell or
		range that you want to refer to by that name.  To
		'undefine' a variable, use set-variable with just its
		name.  Note that if -DA0_REFS is not used, creating a
		variable with the same name as a formula function will
		prevent you from using that function.


V	show-variable

^V	show-all-variables	This shows the values of all currently defined
		variables.

!	recalculate	 Recalculate the spreadsheet until all the cells whose
		values may have changed have been evaluated.  If there are
		circular cell references, the cells in the loop will be
		evaluated at most 40 times (this number subject to change!)

:	bind-command	This asks for the name of a keymap followed by a
		command name and a key to bind it to.  If the 'command' you
		give is a cell or region in the spreadsheet, it is taken as a
		macro, and bound to the key you specify.

;	describe-key	Have the user press a key, and then describe
		what function that key is bound to.

M-<	read-commands	This command opens the file you specify reads in each
		line, and executes them as if you'd typed them in to
		execute-command.  If any command needs more arguments than are
		included on the line, it will prompt you (interactively) for
		the missing information.

M->	write-keys	Write a list of commands to the file that, when
		executed with read-commands, will return the keymaps to their
		current state.

w	write-file	Save the spreadsheet to a file, using the current
		file-format.

r	read-file	Read in a file in the current file-format.  This
		erases the current contents of the spreadsheet first.  This
		may ask for confirmation.

R	read-merge	Read in a file and merge its contents into the
		current spreadsheet.  Note that some file-formats, (like
		panic-save) won't work with this command.

^X	clear-spreadsheet	Delete the entire spreadsheet.  This may ask
		for confirmation if oleo thinks you may be about to lose
		un-saved work.

c	copy-region	Copy a region.  Takes two ranges, copies the source
		range into the dest range.  If the dest range size is a
		multiple of the source range size, the source range is copied
		multiple times.  If the dest range is given as a cell, the
		cell is the location of the top-left corner of the dest range.

C	copy-values-in-region	Copy just the values of one region to another.

F	format-region	Change the format, alignment, protection,
		or width of a region.  If the status line is active, oleo
		will display the current alignment, format, width and
		protection of the top-left cell in the region.

m	move-region	This is similar to copy-region, except that the two
		ranges must be the same size, and that cells that reference
		the source region may be modified to reference the dest
		region instead.  (absolute references are modified, relative
		ones aren't.)  Variables whose ranges are inside the source
		region are also adjusted.

p	print-region	Print a region to a file.  Asks for a region
		(to print) and a filename to to write to.

s	sort-region	Sort a region.  This takes the region to sort, a
		region that is the first element of the region, and a list of
		cells that are to be used as the sorting-keys.  Here's an
		example.  sort-region r1:100c1:10 r1:2c1:10 +r1c2 -r1c3 This
		means: Sort the region R1:100C1:10 in two-row, ten-column
		chunks, sorting on the cell that's in the top-row
		one-column-in.  If they are similar, use the cell in the
		top-row two-columns-in, with high values ending up before low
		ones.

W	write-region-to-file	Write a region of the spreadsheet to a file.
		This command is not allowed with some
		file-formats (like panic-save).

X	delete-region	Delete {value, formula, format, etc} of a
		region.  This DOES NOT ask for confirmation.

M-(	start-entering-macro	Start storing a keyboard macro.  Keyboard
		macros are strings that contain the characters you typed.

M-)	stop-entering-macro	Finish a keyboard macro, and store it in a
		cell that you specify.

M-X	execute-command		This will allow you to execute either a
		builtin command, or a macro.  For a builtin command, simply
		enter the command's name (and, optionally, any arguments the
		command will want).  For a macro, enter its name, or
		the region in the spreadsheet that contains it.

		You can create macros with text strings.  Command names may
		be enclosed in {CMD}, as in {go-left}.  Some commands may
		take arguments, as in {go-up 12} or {goto-cell r1c3}.  To
		execute multiple commands, concatenate them.  Other
		characters are taken as keystrokes, and act exactly as if you
		had typed them.

		When the spreadsheet is executing a macro, it stops when
		1) It encounters an empty cell, or one which is not a string,
		   or which is the empty string "".
		2) an error occurs while trying to parse a command name, or a
		   command's arguments.
		3) All the cells in the region have been executed.

		The top-left cell in a region is executed first, then the one
		below it, down to the bottom cell in the macro, then the one
		to the right of the top-left cell, down to the bottom cell in
		that column, etc. . .

		Macros may execute other macros.

g	goto-cell	Asks for a cell to go to, and moves the cell cursor
		there.  The cell can be either a cell name as in 'R32C96',
		or a variable.  This command starts with a default of
		wherever the cursor was the last time this command was used.
		If you type a range, the cursor is placed in the top-left
		corner of the range, and the cell-mark is placed at the
		opposite corner of the region.

^@	mark-cell	Mark one corner of a rectangular region to use for
		the next command.  (The cell cursor marks the other corner.)
		You can use this while a command is prompting you for a
		region by moving to one corner, typing ^@, moving to the
		other corner, and hitting <RETURN>.

e	edit-cell	Edit the formula of the current cell.

E	edit-value-cell		Edit the value of the current cell.  Using
		this command will replace the current cell's formula with a
		constant expression.


f	format-cell	Change the format, alignment, or protection of the
		current cell, or the width of the current column.  If the
		status line is enabled, the current alignment, format,
		protection, and width will be displayed there.

x	delete-cell	This deletes the (value, formula, format, etc) of the
		current cell.  To delete just the value and formula, use
		<space><return>.

=	edit-cell-with-default	Enter a formula for the current cell with the
		default text of the last formula you typed.

M-0	digit-0		Repeat the next command [digits] times.
M-1	digit-1		You can type multiple digits, as in
M-2	digit-2		M-1 0 0 j
M-3	digit-3		which will go down 100 cells.  This command uses the
M-4	digit-4		digit-map so that you the second and subsequent digits
M-5	digit-5		do not need to be meta-ized.
M-6	digit-6
M-7	digit-7
M-8	digit-8
M-9	digit-9

0-9	enter-text-in-cell	Enter a new formula that begins with the
		character typed.  Note that this blows away whatever was
		saved as a default from the last time you entered a formula.

O	show-options	This shows the current state of all the spreadsheet
		options, and also shows the current definitions for all the
		user-defined variables.

M-W	open-window	This command takes a line beginning with the letter
		'h' (for horizontal), or 'v' (for vertical), followed by the
		number of lines/columns to leave in the current window.
		The cell cursor is placed in the new window.

M-C	close-window	This takes the number of a window to close, and makes
		it go away.  The surrounding window(s) expand to fill the
		space the window occupied.

M-G	goto-window	This takes the number of a window to go to, and
		places the cell-cursor in that window.

M-C-D	debug	This command may be used by wizards to examine the internal
		structure of spreadsheet objects.  This is very useful for
		debugging oleo.

^[	meta-map	The escape key is used to invoke commands that are
		bound to keys in the meta-map.

M-[	ansi-map	This keymap handles the escape sequences produced by
		most (all) ansi arrow keys.  If your keyboard produces
		something different, you will have to modify the keymaps in
		order for them to work.  You may want to add other commands
		to this keymap so that the function keys on your keyboard
		will also do something useful.

others	unbound		Complain.



		Displaying Cell Contents:

If a cell contains a number or string that takes more characters than the
width of the cell to display, the display may slop over into the cell(s) to the
right.  This does not affect the slopped over cells in any way.  Only cells
that are empty, or have their format set to hidden, will be slopped over.

If there isn't room to display a number, a series of '#', will appear in the
cell.

If there isn't room to display any other value, only the characters that fit
(less one, so there'll be a space separating cells) will be displayed.

		Numeric formats:

Oleo can display numbers in a variety of formats.  In addition to the sixteen
user-defined formats, you can use:

integer		The number is rounded to an integer before being displayed.

float		The number is displayed in normal, everyday notation, using
		whatever precision is needed (or fits).

hidden		The number is not displayed.  It is recalculated, etc as
		normal, but the cell is displayed as if it were empty.

graph		The number is displayed as a small graph.  If the number is
		close to zero, it will be displayed as '0', If it is positive,
		a row of '+'-es is displayed.  If it is negative, a row of
		'-'-es is displayed.

The following formats require a precision.  The precision may be a number
from zero to 14, in which case that number of digits will always be displayed
after the decimal point (zero-padding or rounding the number as needed), or
the precision may be 'float', in which case oleo will use as many digits as
necessary.

general		This uses either normal or scientific notation, depending on
		the magnitude of the number and the width of the column.

dollar		Positive values are preceeded by '$', (so 3 is displayed as
		'$3').  Negative values are parenthasized (so -3 is displayed
		as '($3)'), and all large values have a ',' every three
		digits (so 1000 is displayed as '$1,000'.

comma		Positive numbers are not preceede by '$', but this is
		otherwise identical to 'dollar'.

percent		The value is multiplied by 100, and is displayed with a
		trailing '%'.  Thus .01 displays as '1%', while 1 displays as
		'100%'.

fixed		The number is displayed in normal, everyday notation, using
		the precision specified.  'fixed.float' is the same as
		'float'.

exponent	The number is displayed in scientific notation.


		User-defined numeric formats:

You can set up to sixteen user-defined numeric formats:

The current parts of a format are:

	Example:	What it is:
	$		What to print before postive numbers.
	(		What to print before negative numbers.
			What to print after positive numbers.
	)		What to print after negative numbers.
	$0		What to print if the number is zero.
	,		What to print between the thousands and the
			hundreds, etc.
	.		What to print for a decimal point.

	0-14 or float	The number of digits to print after the decimal point.
			'float' means use however many digits are needed, or
			however many will fit, whichever is less. . .

	any-number	What to multiply the value by before printing.
			Most often this will be one, but it might be 100 if
			you're printing percentages, or .000001 if you're
			printing in megabucks.  (Beware of overflow!)

Avoid using digits for the headers, trailers, the comma, or the decimal point
symbol.  Using digits will confuse the internal routines and produce
incomprehensible results. . .


			Other Cell Formatting Options:

Values in a cell may be displayed aligned flush with either the left or right
edges of the cell, or centered in the cell.  The default is left-aligned.

The width of a column of cells may be set to any non-negative value.  A value
of zero means that cells in that column won't be displayed, and the normal
cursor-motion commands will skip over those cells.  However, you can position
the cursor on a non-displayed cell by using the goto-cell command.

If the width of a column is wider than the display, it is displayed as if it
were the width of the display.


			Currently Supported Options:

(no)auto	In auto mode, cells whose values may have chaged are
		automatically recalculated.  In noauto mode, cells are only
		recalculated when the recalculate command is used.

(no)background	In background mode, automatic recalculation is done while
(no)bkgrnd	the spreadsheet waits for you to type a key (and stops while
		the key is being handled).  In nobackground mode, oleo
		performs all its recalculation before listening for
		keystrokes. . .

(no)backup	In backup mode, whenever the spreadsheet writes out a file,
		if the file already exists, a backup copy is made (like
		emacs).

(no)bkup_copy	In nobackup mode bkup_copy is ignored.  In bkup_copy mode,
		backup files are made by copying the original file, instead of
		renaming it.

ticks (number)	This value controls how often should rnd(), cell(), my(),
		curcell(), etc cells get updated.  This value is in seconds
		(???).  The initial value is 10 seconds.

print (number)	This is the width of the page for the print command.  The
		initial value is the width of the screen.

file (format-name) If -DUSE_DLD was defined, format-name may be any .o file
		that contains definitions for the appropriate functions, or
		'panic', which is the only file format that oleo will have
		compiled into it.  If -DUSE_DLD was not defined, format-name
		must be one of sylk, sc, panic, or list, and oleo will have
		to be re-compiled before any other formats may be used.

load (file-name) This option is only avaliable if oleo was compiled with
		-DUSE_DLD.  This option loads in a .o file of spreadsheet
		functions, keyboard commands, and/or keymaps.  Spreadsheet
		functions and keyboard commands must be loaded in before they
		can be used in expressiond or bound to keys.

status (number)	This option controls which line on the screen is used for
		displaying the status of the current cell.  The number may be
		positive, (counting down from the top), negative (counting up
		from the bottom, or zero (disabling the status line).

input (number)	This option controls which line on the screen is used for
		reading lines of text.  The number may be positive (counting
		down from the top), or negative (counting up from the
		bottom), but not zero.
		
The following options affect the currently active window:

(no)page	Basically, in page mode, whenever a paticular cell is
		displayed in the window, it will always be in the same
		location on the screen.  In page mode, the recenter command
		acts just like the redraw-screen command.

(no)pageh	These options turns on or off page mode only in
(no)pagev	the horizontal or vertical axis.

link (wnum)	This option 'links' the current window with the one
		specified.  A window may only be linked to one other window
		at a time.  When a window is linked to another one, whenever
		the cell cursor in the first window is moved, the cursor in
		the other window moves as well.  (unless the cursor in other
		window is locked from moving in that diretion.)

		(Should linking to a window force that window to link
		back?  That might make life easier for naive users.)

nolink		This removes the link (if any) on the current window.
unlink

(no)lockh	These options prevent the cell cursor in the current window
(no)lockv	from moving in the horizontal or vertical direction, but only
		when the cell cursor is moved in a window that this one is
		linked.


(no)edges	In edges mode oleo displays Row and Column numbers at the top
		and left edges of the window.  Perhaps edges should be split
		into edgeh and edgev?

(no)standout	In standout mode, the edges (see (no)edges) are drawn in
		standout mode (reverse video, usually).

row n		Moves the cell cursor to row n.  This is obsolescent, and may
		go away.

col n		Moves the cell cursor to column n.  This is obsolescent and
		may go away.

Options supported by the list file format:

list ch		Use the character CH to separate the cell values.


		File names:

If a file name begins with a '|', the rest of the name is taken as a command,
which oleo opens a pipe to.  So you can use the name '|zcat file.Z' to read
a compressed spreadsheed, or '|compress > file.Z' to write one.

			Formulae:

Numbers must be entered in 'general' format:
	[-]digits[.digits][e[-]digits]

Strings are entered surrounded by double-quotes.  To include unusual
characters, you can either use \char (works well for ") or use
\nnn where nnn is the octal code for the character you want to include.

			Magic constants:

Note that oleo automatically converts the names of constants to upper case,
but they can be entered in any case.

#TRUE			The logical TRUE value
#FALSE			The logical FALSE value

#ERROR			Various error types.
#BAD_INPUT
#NON_NUMBER
#NON_STRING
#NON_BOOL
#NON_RANGE
#OUT_OF_RANGE
#NO_VALUES
#DIV_BY_ZERO
#BAD_NAME
#NOT_AVAIL
#PARSE_ERROR
#NEED_OPEN
#NEED_CLOSE
#NEED_QUOTE
#UNK_CHAR
#UNK_FUNC

#INF			Various trancendental values.  On some machines,
#INFINITY		(like the vax), these may all be the same value.
#NAN
#NOT_A_NUMBER
#NINF
#MINUS_INFINITY


			Infix functions:

str1 & str2		Text concatination.
val1 = val2		#TRUE if val1 and val2 can be considered equal.
			#FALSE otherwise
val1 != val2		Equivelent to !(val1=val2)
num1 >= num2		...
num1 > num2		...
num1 < num2		...
num1 <= num2		...
int1 % int2		Modulus		Note that these functions are
num1 ^ num2		Exponentiaton	not as good as they should be
num1 * num2		Multiplication	at detecting overflow.  There
num1 / num2		Division	*IS* code that should force
num1 + num2		Addition	INT type expressions to become
num1 - num2		Subtraction	FLOAT, if the result wouldn't
						fit in an INT. . .
( val )			(To override default precedence) Note that
			since oleo stores expressions in a
			byte-compiled form, excess parens will
			mysteriously vanish.
- num			0-num
! bool			#TRUE if bool is #FALSE
			#FALSE if bool is #TRUE, error otherwise.
bool ? val1 : val2	if(bool==#TRUE)
				evaluate val1
			else if(bool!=#FALSE)
				error...
			else
				evaluate val2.


		Prefix functions:

Note that if oleo is compiled with -DA0_REFS, all of these functions have an
'@' prepended to their names.

if(bool,val1,val2)	if(test==#TRUE)
				evaluate val1
			else if(test!=#FALSE)
				error...
			else
				evaluate val2.
and(bool1,bool2)	if(val1==#FALSE)
				#FALSE
			else if(val1!=#TRUE)
				error...
			else val2;
or(bool1,bool2)		if(val1==#TRUE)
				#TRUE
			else if(val1!=#FALSE)
				error...
			else val2;
pi()			3.14159265358979326848
row()			The row number of the cell the expression is in.
col()			The column number of the cell the expression is in.
now()			The current time in seconds since Jan 1 1970 (?)
abs(num)		The absolute value of num.
acos(num)		The arc-cosine of num (num in radians)
asin(num)		The arc-sine of num (num in radians)
atan(num)		The arc-tangent of num (in radians)
int(num)		Convert to integer (toward zero)
ceil(num)		Convert to integer (round up)
floor(num)		Convert to integer (round down)
cos(num)		The cosine of num (in radians)
dtr(num)		num degrees in radians
exp(num)		The exponential function of num
log(num)		The natural log of num
log10(num)		The log of num to base 10
rtd(num)		num radians in degrees
sin(num)		The sine (in radians) of num
sqrt(num)		The square-root of num
tan(num)		The tangent (in radians) of num
rnd(num)		A random number from 0 to num-1
negate(num)		0-num
not(bool)		#TRUE if bool is #FALSE
			#FALSE if bool is #TRUE, error otherwise.
iserr(val)		#TRUE if the expression is an error
			else #FALSE
isnum(val)		#TRUE if the expression is a number, or can be
			automatically converted into a number, thus
			isnum("12") is #TRUE, while isnum("12 ") is
			#FALSE. (This might be worth fixing.)
rows(rng)		number of rows in rng.
cols(rng)		number of columns in rng.
ctime(num)		Convert num into a readable date/time string.
atan2(num1,num2)	Two number arctangent
hypot(num1,num2)	use man 2 hypot
fixed(num1,num2)	num1 rounded to num2 decimal places

index(rng,int)		the contents of the int-th cell in rng.
index(rng,num1,num2)	The contents of the int1-th down and int2-th
			over cell in rng
oneof(int,val1,val2,val3...) switch(int) {
				case 1: val1;
				case 2: val2;
				...
				default: error;
			}

For the following functions, arguments that are ranges are scanned
for numeric values only.  Strings, error values, empty cells, etc, are ignored.

Strings, etc, that are explicitly given to the functions are subjected to the
usual conversion.

sum(vr1...)		...
prod(vr1...)		...
avg(vr1...)		...
std(vr1...)		The SAMPLE standard deviation.  To get the population
			standard deviation, use sqrt(var(...))
max(vr1...)		...
min(vr1...)		...
cnt(vr1...)		The number of numeric values found.
var(vr1...)		The POPULATION variance.  To get the sample variance,
			use std(...)^2

These functions are in the 'string' package.  If oleo is compiled with
-DUSE_DLD, the string package must be loaded before these functions can be
used.  If a spreadsheet that uses these functions is loaded before the
string package is loaded, things will fail (silently!)  (This is probably a
bug.

len(str)		length of string in characters.
strupr(str)		string converted to upper case
strlwr(str)		string converted to lower case
strcap(str)		string with each word capitalized.
trim(str)		string with extra spaces and non-ascii chars
			removed.
find(str1,str2,int)	return the location where str2 appears in
			str1, start looking at character #int
substr(int1,int2,str)	The characters in string from position int1
			to position int2.  Positions can be either
			positive (First character is #1, last char is
			#(length of string)) or negative(last
			character is #-1, first character is #-(length
			of string)).
mid(str,int1,int2)	The characters in string from int1 (counting
			from the beginning) continuing for int2 chars.
edit(str,int1,int2,...)	Remove the text from int1 to int2 in string
			and replace it with ... (zero or more strings)
			int1 and int2 are like for substr() above.
repeat(int,str)		str repeated int times, thus repeat(2,"foo")
			returns "foofoo"
concat(vr1,...)		Concatinate strings, ranges, etc.


These functions are in the 'cells' package.  If oleo is compiled with
-DUSE_DLD, the cells package must be loaded before these functions can be
used.
my(str)			String:		Returns:
			row		row()
			column		col()
			lock		"locked" or "unlocked"
			protection	ditto
			justify		"left" "right" "center" or "default"
			alignment	ditto
			format		"default" "user-1" etc.
			fmt		ditto.
			type		"error", "boolean", "float",
					"integer", "null", "Unknown",
					etc.
			formula		A string of the cell's current
					formula.
			value		The cells current value.
			anything-else	error--> #BAD_INPUT

curcell(str)		Like my(), but for the cell under the
			cell-cursor in the current window.

cell(int1,int2,str)	Like my(), but for the cell at Rint1Cint2.

member(rng,val)		The number of the first cell in RNG that contains
			VAL, or zero if no cells contain it.


These next four functions could probably be replaced by a pair of smart
regex routines. . .

smember(rng,str)	The number of the first cell in RNG that contains a
			substring of STR, or zero if no cell contains one.

members(rng,str)	The number of the first cell in RNG whose value is
			a substring of STR.

pmember(rng,str)	The number of the first cell in RNG whose value
			equals the first few characters of STR.

memberp(rng,str)	The number of the first cell in RNG whose value
			starts with STR.

hlookup(rng,num,int)	Scan through the top row of RANGE looking for a
			number which is greater than NUM.  Then return the
			value in the cell that is INT rows down from the top
			of the range.

vlookup(rng,num,int)	Like hlookup, but scans the left column
			and returns the value in the cell that is INT
			columns over from the left edge of the range.


These functions are in the 'busi' package.  If oleo is compiled with
-DUSE_DLD, the busi package must be loaded before these functions can be
used.

pmt(p,r,t)		Payment for a loan of $P at rate R for T payments. . .

pv(pmt,int,term)	...

npv(rng,rate)
irr(range,guess)
fv(pmt,int,term)
rate(fut,pres,term)
term(pmt,int,fut)
cterm(int,fut,pres)
sln(cost,salvage,life)
syd(cost,salvage,life,period)
ddb(cost,salvage,life,period)
anrate(pmt,pres,term)
anterm(pmt,prin,rate)
balance(prin,rate,term,period)
paidint(prin,rate,term,period)
kint(prin,rate,term,period)
kprin(prin,rate,term,period)
compbal(print,rate,term)
