FPLOT(1) FPLOT(1)
NAME
fplot - plot elementary function
SYNOPSIS
fplot [ -c [ -s size ]] [ -r range ] functions ...
DESCRIPTION
Fplot plots elementary functions separated by spaces. The
default output is the screen, but if the -c option is speci-
fied, the plot is written to the standard output as an
r8g8b8 image(6). The latter image size is either 640x480 or
the one specified by the -s option's argument (in the
WIDTHxHEIGHT format). The -r option accepts as argument the
x and y ranges, in the format `xmin:xmax ymin:ymax'. By
default fplot draws coordinate axes and tick marks; the -a
option inhibits this.
Each function to be plotted may be a combination of the
independent variable x, the elementary operations (+, -, *,
/ and %), and the functions described in sin(2) and exp(2).
The exception being that x^n raises x to the nth power, log
is the base 10 logarithm, and ln is the natural logarithm.
EXAMPLES
Plot the absolute value and x^3 functions to a 400x400
image(6) on standard output and view with page(1).
fplot -c -s 400x400 'sqrt(x*x)' 'x^3' | page
SOURCE
/sys/src/cmd/fplot.c
SEE ALSO
exp(2), sin(2), image(6), plot(1).
DIAGNOSTICS
Fplot either exits with `syntax error' or an empty status.
BUGS
There is no unary plus or minus.
Axes are not drawn in -c output.
HISTORY
Fplot first appeared in 9front (July, 2011).
Page 1 Plan 9 (printed 9/8/24)