python numpy.vstack()
numpy.vstack()函数用于将输入数组的序列垂直堆叠成一个数组。
语法: numpy.vstack(tup)
参数 :
tup : [sequence of ndarrays] 包含要堆叠的数组的元组。这些数组除了第一个轴以外,必须具有相同的形状。
返回: [stacked ndarray] 输入数组的叠加数组。
代码#1:
# Python program explaining
# vstack() function
import numpy as geek
# input array
in_arr1 = geek.array([ 1, 2, 3] )
print ("1st Input array : \n", in_arr1)
in_arr2 = geek.array([ 4, 5, 6] )
print ("2nd Input array : \n", in_arr2)
# Stacking the two arrays vertically
out_arr = geek.vstack((in_arr1, in_arr2))
print ("Output vertically stacked array:\n ", out_arr)
输出:
1st Input array :
[1 2 3]
2nd Input array :
[4 5 6]
Output vertically stacked array:
[[1 2 3]
[4 5 6]]
代码#2:
# Python program explaining
# vstack() function
import numpy as geek
# input array
in_arr1 = geek.array([[ 1, 2, 3], [ -1, -2, -3]] )
print ("1st Input array : \n", in_arr1)
in_arr2 = geek.array([[ 4, 5, 6], [ -4, -5, -6]] )
print ("2nd Input array : \n", in_arr2)
# Stacking the two arrays vertically
out_arr = geek.vstack((in_arr1, in_arr2))
print ("Output stacked array :\n ", out_arr)
输出:
1st Input array :
[[ 1 2 3]
[-1 -2 -3]]
2nd Input array :
[[ 4 5 6]
[-4 -5 -6]]
Output stacked array :
[[ 1 2 3]
[-1 -2 -3]
[ 4 5 6]
[-4 -5 -6]]