Plot max of graph using python

Question

I'm new to python and have a question. I've figured out how to graph functions, but how do I plot a point which indicates the max and minimum values? Here is my code, and it graphs properly I believe. Thank you.

    import numpy as np  
    import matplotlib.pyplot as plt  
    def graph(formula, x_range):  
        x = np.array(x_range)  
        y = eval(formula)
        plt.plot(x, y)  
        plt.show()

    graph('-x**4 + 508 * x + 40', range(-10, 200))

Out of curiosity, why would you be plotting a single point? Is the idea to superimpose it onto another plot? — dsaxton
– dsaxton, Commented Aug 27, 2015 at 18:42
Oh, I'm just trying to learn how to use python, don't really have a purpose yet :) — Fabian
– Fabian, Commented Aug 27, 2015 at 19:30

DaveQ · Accepted Answer · 2015-08-27 18:37:30Z

3

n_max = y.argmax()
plt.plot(x[n_max],y[n_max],'o')
n_min = y.argmin()
plt.plot(x[n_min],y[n_min],'x')

something like this?

answered Aug 27, 2015 at 18:37

DaveQ

1,77211 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Plot max of graph using python

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related