Interface to the Gnuplot interpreter

class sage.interfaces.gnuplot.Gnuplot

Bases: SageObject

Interface to the Gnuplot interpreter.

console()

gnuplot()

interact(cmd)

plot(cmd, file=None, verbose=True, reset=True)

Draw the plot described by cmd, and possibly also save to an eps or png file.

INPUT:

• cmd – string

• file – string (default: None); if specified save plot to given file, which may be either an eps (default) or png file

• verbose – print some info

• reset – true; reset gnuplot before making graph

OUTPUT: displays graph

Note

Note that ^ s are replaced by ** s before being passed to gnuplot.

plot3d(f, xmin=-1, xmax=1, ymin=-1, ymax=1, zmin=-1, zmax=1, title=None, samples=25, isosamples=20, xlabel='x', ylabel='y', interact=True)

plot3d_parametric(f='cos(u)*(3 + v*cos(u/2)), sin(u)*(3 + v*cos(u/2)), v*sin(u/2)', range1='[u=-pi:pi]', range2='[v=-0.2:0.2]', samples=50, title=None, interact=True)

Draw a parametric 3d surface and rotate it interactively.

INPUT:

• f – string; a function of two variables, e.g., 'cos(u)\*(3 + v\*cos(u/2)), sin(u)\*(3 + v\*cos(u/2)), v\*sin(u/2)'

• range1 – string; range of values for one variable, e.g., '[u=-pi:pi]'

• range2 – string; range of values for another variable, e.g., '[v=-0.2:0.2]'

• samples – integer; number of sample points to use

• title – string; title of the graph

EXAMPLES:

Sage

sage: gnuplot.plot3d_parametric('v^2*sin(u), v*cos(u), v*(1-v)')   # optional - gnuplot, not tested (since something pops up)

Python

>>> from sage.all import *
>>> gnuplot.plot3d_parametric('v^2*sin(u), v*cos(u), v*(1-v)')   # optional - gnuplot, not tested (since something pops up)

sage.interfaces.gnuplot.gnuplot_console()