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+--- Thread: Create an empty NumPy array (/thread-18016.html)
Create an empty NumPy array - karansingh - May-03-2019
How can I create an empty NumPy array in different ways.
RE: Create an empty NumPy array - scidam - May-03-2019
You can create empty numpy array by passing arbitrary iterable to array constructor
numpy.array, e.g.import numpy as np np.array(list()) np.array(tuple()) np.array(dict()) np.fromfunction(lambda x: x, shape=(0,))Why do you asking about multiple ways of doing that?
RE: Create an empty NumPy array - DeaD_EyE - May-03-2019
shape = (3, 256, 256, 2) zeros = np.zeros(shape, dtype=np.complex128) ones = np.ones(shape, dtype=np.complex128) zeros_like = np.zeros_like(zeros) ones_like = np.ones_like(ones) zeros_like_f64 = np.zeros_like(zeros, dtype=np.float64) ones_like_f64 = np.ones_like(ones, dtype=np.float64) # window funcitons hanning = np.hanning(256) hamming = np.hamming(256) blackman = np.blackman(256) # random samples rnd = np.random.random(shape) # random complex real_part = np.random.random(shape) # float64 imag_part = np.random.random(shape) # float64 signal = real_part + 1j * image_part # multiplication with float and imaginary number casts to complex128
print(np.eye(3))
Output:[[1. 0. 0.]
[0. 1. 0.]
[0. 0. 1.]]RE: Create an empty NumPy array - dukoolsharma - May-04-2019
There are two methods to create NumPy array-
First method-
>>> import numpy >>> numpy.array([]) array([], dtype=float64)Second method-
>>> numpy.empty(shape=(0,0)) array([], shape=(0, 0), dtype=float64)