How to plot multiple functions on the same figure, in Matplotlib?
PythonFunctionMatplotlibGraphPython Problem Overview
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
Python Solutions
Solution 1 - Python
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()
Solution 2 - Python
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()
Solution 3 - Python
Just use the function plot as follows
figure()
...
plot(t, a)
plot(t, b)
plot(t, c)
Solution 4 - Python
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()