How to plot multiple functions on the same figure, in Matplotlib?

How can I plot the following 3 functions (i.e. sin, cos and the addition), on the domain t, in the same figure?

from numpy import *
import math
import matplotlib.pyplot as plt

t = linspace(0, 2*math.pi, 400)

a = sin(t)
b = cos(t)
c = a + b

Answers:

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Method 1

To plot multiple graphs on the same figure you will have to do:

from numpy import *
import math
import matplotlib.pyplot as plt

t = linspace(0, 2*math.pi, 400)
a = sin(t)
b = cos(t)
c = a + b

plt.plot(t, a, 'r') # plotting t, a separately 
plt.plot(t, b, 'b') # plotting t, b separately 
plt.plot(t, c, 'g') # plotting t, c separately 
plt.show()

Method 2

Perhaps a more pythonic way of doing so.

from numpy import *
import math
import matplotlib.pyplot as plt

t = linspace(0,2*math.pi,400)
a = sin(t)
b = cos(t)
c = a + b

plt.plot(t, a, t, b, t, c)
plt.show()

Method 3

Just use the function plot as follows

figure()
...
plot(t, a)
plot(t, b)
plot(t, c)

Method 4

If you want to work with figure, I give an example where you want to plot multiple ROC curves in the same figure:

from matplotlib import pyplot as plt
plt.figure()
for item in range(0, 10, 1): 
    plt.plot(fpr[item], tpr[item])
plt.show()

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0