With the help of Numpy matrix.choose() method, we can select the elements from a matrix by passing a parameter as an array which contain the index of row number to be selected. Output array having the same size as passed in the parameter.
Syntax :
matrix.choose()Return : Return an array of element choice
Example #1 :
In this example we can see that with the help of matrix.choose() method we are able to extract an array of choices from matrix.
# import the important module in python import numpy as np # make a matrix with numpy gfg = np.matrix('[1, 2, 3, 4; 3, 1, 5, 6]') # applying matrix.choose() method Lazyroar = np.choose([1, 0, 1, 0], gfg) print(Lazyroar) |
Output:
[[3 2 5 4]]
Example #2 :
# import the important module in python import numpy as np # make a matrix with numpy gfg = np.matrix('[1, 2, 3; 4, 5, 6; 7, 8, 9]') # applying matrix.choose() method Lazyroar = np.choose([2, 0, 1], gfg) print(Lazyroar) |
Output:
[[7 2 6]]
