numpy 矩阵运算| rand()函数
原文:https://www . geesforgeks . org/numpy-matrix-operations-rand-function/
numpy.matlib.rand() 是 numpy 中做矩阵运算的另一个功能。它返回给定形状的[0，1]上均匀分布的随机值矩阵。
语法:num py . MATLAB . rand(* args)
参数: *参数:【参数】输出矩阵的形状。如果给定 N 个整数，每个整数指定一个维度的大小。如果作为元组给出，这个元组给出完整的形状。如果有多个参数，并且第一个参数是元组，则忽略其他参数。
返回:随机值的矩阵。
代码#1 :
# Python program explaining
# numpy.matlib.rand() function
# importing matrix library from numpy
import numpy as geek
import numpy.matlib
# desired 3 x 4 random output matrix
out_mat = geek.matlib.rand((3, 4))
print ("Output matrix : ", out_mat)
Output :
Output matrix : [[ 0.37976085 0.68700838 0.83898103 0.72073804]
[ 0.80577587 0.2508264 0.30179229 0.81376797]
[ 0.70202528 0.17830863 0.61509844 0.27758369]]
代码#2 :
# Python program explaining
# numpy.matlib.rand() function
# importing numpy and matrix library
import numpy as geek
import numpy.matlib
# desired 1 x 5 random output matrix
out_mat = geek.matlib.rand(5)
print ("Output matrix : ", out_mat)
Output :
Output matrix : [[ 0.56138247 0.97881105 0.53380995 0.27486091 0.1603695 ]]
代码#3 :
# Python program explaining
# numpy.matlib.rand() function
# importing numpy and matrix library
import numpy as geek
import numpy.matlib
# more than one argument given
out_mat = geek.matlib.rand((5, 3), 4)
print ("Output matrix : ", out_mat)
Output :
Output matrix : [[ 0.86770893 0.35628104 0.19744129]
[ 0.90376689 0.58349554 0.9830152 ]
[ 0.64711739 0.09531791 0.17555793]
[ 0.66141287 0.09164568 0.28818979]
[ 0.92225364 0.56779388 0.58498534]]
