CODEWITHSUNDEEP
pythonnumpy
Sam Bilbow
Sam Bilbow

Reputation: 11

What does y=np.zeros(len(x)) do in this function definition?

Learning data visualisation with python and numpy, provided with an example in a Jupyter notebook

What does y=np.zeros(len(x)) do in this definition? Set y = 0?

x=np.linspace(-2*np.pi,2*np.pi,100)


# i-th order sine series decomposition
from math import factorial
def sineseries(x,order):
    y=np.zeros(len(x))
    for i in range(order):
        y=y+(-1.)**i/factorial(2*i+1)*x**(2*i+1)
    return y

for i in range(20):
    plt.figure()
    plt.plot(x,sineseries(x,i),'.')
    plt.plot(x,np.sin(x),'k')

Upvotes: 1

Views: 2944

Answers (1)

Franco Piccolo
Franco Piccolo

Reputation: 7430

It creates an array with len(x) zeros.

For example if x has 3 elements then the resulting array will be [0, 0, 0]

Upvotes: 1

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