frame ht e wid e top dotted ...: Set the frame around the graph to specified ht and wid; default is 2 by 3 (inches). The line styles (dotted, dashed, invis, solid (default)) of the sides (top, bot, left, right) of the frame can be set independently.

label side a label as a set of strings adjust: Place label on specified side; default side is bottom. adjust is up (or down left right) expr to shift default position; width expr sets the width explicitly.

ticks side in at optname expr, expr, ...: Put ticks on side at expr, ..., and label with expr . If any expr is followed by "...", label tick with "...", and turn off all automatic labels. If "..." contains %f's, they will be interpreted as printf formatting instructions for the tick value. Ticks point in or out (default out). Tick iterator: instead of at ..., use from expr to expr by op expr where op is optionally +-*/ for additive or multiplicative steps. by can be omitted, to give steps of size 1. If no ticks are requested, they are supplied automatically; suppress this with ticks off. Automatic ticks normally leave a margin of 7% on each side; set this to anything by margin = expr.

grid side linedesc at optname expr, expr, ...: Draw grids perpendicular to side in style linedesc at expr, .... Iterators and labels work as with ticks.

coord optname x min, max y min, max log x log y: Set range of coords and optional log scaling on either or both. This overrides computation of data range. Default value of optname is current coordinate system (each coord defines a new coordinate system).

plot str at point; I str at point: Put str at point. Text position can be qualified with rjust, ljust, above, below after "...".

line from point to point linedesc: Draw line from here to there. arrow works in place of line.

next optname at point linedesc: Continue plot of data in optname to point; default is current.

draw optname linedesc ...: Set mode for next: use this style from now on, and plot "..." at each point (if given).

new optname linedesc ...: Set mode for next, but disconnect from previous.

A list of numbers x y1 y2 y3 ... is treated as plot bullet at x,y1; plot bullet at x,y2; etc., or as next at x,y1 etc., if draw is specified. Abscissae of 1,2,3,... are provided if there is only one input number per line.

A point optname expr, expr maps the point to the named coordinate system. A linedesc is one of dot dash invis solid optionally followed by an expression.

define name {whatever}: Define a macro. There are macros already defined for standard plotting symbols like bullet, circle, star, plus, etc., in /sys/lib/grap.defines, which is included if it exists.

var = expr: Evaluate an expression. Operators are + - * and /. Functions are log and exp (both base 10), sin, cos, sqrt; rand returns random number on [0,1); max(e,e), min(e,e), int(e).

print expr; print "...": As a debugging aid, print expr or string on the standard error.

copy "file name": Include this file right here.

copy thru macro: Pass rest of input (until .G2) through macro, treating each field (non-blank, or "...") as an argument. macro can be the name of a macro previously defined, or the body of one in place, like /plot $1 at $2,$3/.

copy thru macro until "string": Stop copy when input is string (left-justified).

pic remainder of line: Copy to output with leading blanks removed.

graph Name pic-position: Start a new frame, place it at specified position, e.g., graph Thing2 with .sw at Thing1.se + (0.1,0). Name must be capitalized to keep pic happy.

.anything at beginning of line: Copied verbatim.

sh %anything %: Pass everything between the %'s to the shell; as with macros, % may be any character and anything may include newlines.

# anything: A comment, which is discarded.

Order is mostly irrelevant; no category is mandatory. Any arguments on the .G1 line are placed on the generated .PS line for pic.

/sys/lib/grap.defines

definitions of standard plotting characters, e.g., bullet