Interface to the Gnuplot interpreter¶
- class sage.interfaces.gnuplot.Gnuplot[source]¶
- Bases: - SageObject- Interface to the Gnuplot interpreter. - plot(cmd, file=None, verbose=True, reset=True)[source]¶
- 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)[source]¶
 - 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)[source]¶
- 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: gnuplot.plot3d_parametric('v^2*sin(u), v*cos(u), v*(1-v)') # optional - gnuplot, not tested (since something pops up) - >>> 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)