Sage graphs

graphs.sage

#!/usr/bin/env sage
# -*- mode: Python -*-

'''To run this, run the terminal command "sage graphs.sage". Or simply run the
command sage and type the lines of code into the prompt

To get help, from the sage prompt run help(plot), or see
http://doc.sagemath.org/html/en/reference/plotting/sage/plot/plot.html

'''

# Simplest graph
p = plot(x**2, 0, 10)
# To just show
p.show()
# To save; pdf is lossless and allows infinite-precision zoom, so it is best choice.
# p.save("myfile.pdf")

# More complicated
q = plot([cos(x), sin(x), -x], -pi, pi,
         color = ['green', 'purple', 'gray'],
         linestyle=['-', '-', '--'],
         thickness=3,
         legend_label=['$\cos(x)$', '$\sin(x)$', '$-x$'],
         ticks = ([-pi, -pi/2, 0, pi/2, pi], [-1, 0, 1]),
         tick_formatter='latex')
q.show()