使用stack()在軸0上連線一系列NumPy陣列
要連線一系列陣列,請在Python NumPy中使用**numpy.stack()**方法。axis引數指定結果維度中新軸的索引。如果axis=0,它將是第一維;如果axis=-1,它將是最後一維。
該函式返回的堆疊陣列比輸入陣列多一個維度。axis引數指定結果維度中新軸的索引。例如,如果axis=0,它將是第一維;如果axis=-1,它將是最後一維。
如果提供out引數,則將其作為結果的存放目標。其形狀必須正確,與未指定out引數時stack返回的形狀匹配。
步驟
首先,匯入所需的庫:
import numpy as np
使用array()方法建立兩個NumPy陣列。我們插入了int型別的元素:
arr1 = np.array([49, 76, 61, 82, 69, 29]) arr2 = np.array([40, 60, 89, 55, 32, 98])
顯示陣列:
print("Array 1...
", arr1)
print("
Array 2...
", arr2)獲取陣列的型別:
print("
Our Array 1 type...
", arr1.dtype)
print("
Our Array 2 type...
", arr2.dtype)獲取陣列的維度:
print("
Our Array 1 Dimensions...
",arr1.ndim)
print("
Our Array 2 Dimensions...
",arr2.ndim)獲取陣列的形狀:
print("
Our Array 1 Shape...
",arr1.shape)
print("
Our Array 2 Shape...
",arr2.shape)要連線一系列陣列,請在Python NumPy中使用numpy.stack()方法。axis引數指定結果維度中新軸的索引。如果axis=0,它將是第一維;如果axis=-1,它將是最後一維:
print("
Result (stack over axis 0)...
",np.stack((arr1, arr2), axis = 0))
示例
import numpy as np
# Creating two numpy arrays using the array() method
# We have inserted elements of int type
arr1 = np.array([49, 76, 61, 82, 69, 29])
arr2 = np.array([40, 60, 89, 55, 32, 98])
# Display the arrays
print("Array 1...
", arr1)
print("
Array 2...
", arr2)
# Get the type of the arrays
print("
Our Array 1 type...
", arr1.dtype)
print("
Our Array 2 type...
", arr2.dtype)
# Get the dimensions of the Arrays
print("
Our Array 1 Dimensions...
",arr1.ndim)
print("
Our Array 2 Dimensions...
",arr2.ndim)
# Get the shape of the Arrays
print("
Our Array 1 Shape...
",arr1.shape)
print("
Our Array 2 Shape...
",arr2.shape)
# To join a sequence of arrays, use the numpy.stack() method in Python Numpy
# The axis parameter specifies the index of the new axis in the dimensions of the result.
# If axis=0 it will be the first dimension and if axis=-1 it will be the last dimension.
print("
Result (stack over axis 0)...
",np.stack((arr1, arr2), axis = 0))輸出
Array 1... [49 76 61 82 69 29] Array 2... [40 60 89 55 32 98] Our Array 1 type... int64 Our Array 2 type... int64 Our Array 1 Dimensions... 1 Our Array 2 Dimensions... 1 Our Array 1 Shape... (6,) Our Array 2 Shape... (6,) Result (stack over axis 0)... [[49 76 61 82 69 29] [40 60 89 55 32 98]]
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