Assume we have a mathematical formula and we would like to plot a graph of it using the standard Cartesian coordinate system.
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This answer assumes you have imported SymPy as follows.
1 2 from sympy import * # load all math functions init_printing( use_latex='mathjax' ) # use pretty math output
You can write a formula and plot it in just a few lines of code.
1 2 3 var( 'x' ) formula = x**2 - 5*x + 9 plot( formula )
1 <sympy.plotting.plot.Plot at 0x7f4b97b97520>
If you want to elimiate the extra bit of text after the graph,
just assign the plot to a variable, as in
p = plot( formula ).
By default, the graph always covers $x=-10$ to $x=10$. You can change those limits as follows.
1 plot( formula, (x,1,3) ) # just plot from x=1 to x=3
1 <sympy.plotting.plot.Plot at 0x7f4bbc097550>
You can also plot more than one function on the same graph.
1 2 formula2 = 10*sin(x) + 20 plot( formula, formula2 )
1 <sympy.plotting.plot.Plot at 0x7f4b2dcd9c00>
Content last modified on 24 July 2023.
Contributed by Nathan Carter (firstname.lastname@example.org)