Drawing directions fields

Question

Is there a way to draw direction fields in python?

My attempt is to modify http://www.compdigitec.com/labs/files/slopefields.py giving

#!/usr/bin/python
         


        

Answer 1

Try changing your values for the parameters to this:

XSCL = .2
YSCL = .2

These parameters determine how many points are sampled on the axes.

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As per your comment, you'll need to also plot the functions for which the derivation dy_dx(x, y) applies.

Currently, you're only calculating and plotting the slope lines as calculated by your function dy_dx(x,y). You'll need to find (in this case 3) functions to plot in addition to the slope.

Start by defining a function:

def f1_x(x):
    return x**3-x**2-2x;

and then, in your loop, you'll have to also write the desired values for the functions into the fileobj file.