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 4 Answers
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() 
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()
Just use the function plot as follows
figure() ... plot(t, a) plot(t, b) plot(t, c) 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() 
