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questsin/python numpy (cheat sheet) .py

Created February 20, 2019 16:53
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python numpy (cheat sheet) .py
import numpy as np
np.arange(1,5)
np.linspace(1,5,4)
np.zeros(3)
np.ones(3)
np.random.randn(1000)
arr = np.array([1,2,3])
arr
len(arr)
arr[1]
dtype('int64')
v1 = np.random.rand(1000000)
%time v1 * v2
dir(v)
my_array = np.arange(35)
my_array
mymask = my_array > 4
mymask
my_array.shape = (7,5)
my_array.shape
my_array.ndim
my_array.size
v.reshape((4, 3))
mat[np.abs(mat - mat.mean()) > 1.5*mat.std()]
import this
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