CODEWITHSUNDEEP
pythonmatplotlibrandom
friedriceeee
friedriceeee

Reputation: 19

Random function not compatible with matplotlib?

import random
import matplotlib.pyplot as plt
a = 5
b = 10
c = 20
x = (print(random.randrange(a, b)))
y = (print(random.randrange(b, c)))
projectname = input('What is your project name?: ')
indep = input('What is your independent variable?: ')
dep = input('What is your dependent variable?: ')
plt.plot(x, y)
plt.xlabel(indep)
plt.ylabel(dep)
plt.title(projectname)
plt.show()

Here is the error code: "ValueError: x, y, and format string must not be None"

New to coding

Upvotes: 0

Views: 51

Answers (1)

Inciarte
Inciarte

Reputation: 79

Take a look at these lines

x = (print(random.randrange(a, b)))
y = (print(random.randrange(b, c)))

The result of the print function is None. So the value stored in the x and y variables is None and not the result of random.randrange. So when you get to

plt.plot(x, y)

your actually saying plt.plot(None, None) instead of

plt.plot(random.randrange(a, b), random.randrange(b, c))

If your wanting to show the user the random values selected you would want something like this

x = random.randrange(a, b)
y = random.randrange(b, c)
print(x)
print(y)

Upvotes: 4

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