Further information#

How can you plot a function#

It is possible to plot a function using sympy using the sympy.plot function:

Usage

sympy.plot(expression)

So for example, here is a plot of \(f(x)=x^2 + 3x + 1\):

import sympy as sym

x = sym.Symbol("x")
sym.plot(x ** 2 + 3 * x + 1)
../../../_images/main_1_01.png 
<sympy.plotting.backends.matplotlibbackend.matplotlib.MatplotlibBackend at 0x7f0c00bee980>

It is possible to specify the \(x\) and combine it with other plots:

sym.plot(x ** 2 + 3 * x + 1, xlim=(-5, 5))
../../../_images/main_3_01.png 
<sympy.plotting.backends.matplotlibbackend.matplotlib.MatplotlibBackend at 0x7f0bc8ad9270>

This plotting solution is good if you want to take a look at a function quickly but it is not recommended. The main python library for plotting is called matplotlib and is covered in Matplotlib.