在 NumPy 中沿轴 1 重复掩码数组的元素
要重复掩码数组的元素,请使用ma. MaskedArray.repeat()Numpy 中的方法。“ repeats ”参数设置每个元素的重复次数。重复广播以适应形状。“axis”参数是沿其重复值的轴。轴值设置为 1。
该方法返回与 a 具有相同形状的输出数组,但沿给定轴除外。轴是沿其重复值的轴。默认情况下,使用扁平化的输入数组,并返回一个扁平的输出数组。
脚步
首先,导入所需的库 -
import numpy as npimportnumpy.maas ma
使用该方法创建一个包含 int 元素的数组-numpy.array()
arr = np.array([[49, 85, 45], [67, 33, 59]])print("Array...\n", arr)
print("\nArray type...\n", arr.dtype)
获取数组的维度 -
print("Array Dimensions...\n",arr.ndim)
创建一个屏蔽数组并将其中一些屏蔽为无效 -
maskArr = ma.masked_array(arr, mask =[[0, 0, 1], [ 0, 1, 0]])print("\nOur Masked Array\n", maskArr)
print("\nOur Masked Array type...\n", maskArr.dtype)
获取 Masked Array 的尺寸 -
print("\nOur Masked Array Dimensions...\n",maskArr.ndim)
获取蒙面阵列的形状 -
print("\nOur Masked Array Shape...\n",maskArr.shape)
获取 Masked Array 的元素数量 -
print("\nElements in the Masked Array...\n",maskArr.size)
要重复掩码数组的元素,请使用 ma. Numpy 中的方法。“repeats”参数设置每个元素的重复次数。重复广播以适应形状。“axis”参数是沿其重复值的轴。默认情况下,使用扁平化的输入数组,并返回一个扁平的输出数组。轴值设置为 1 -MaskedArray.repeat()
print("\nResult...\n",maskArr.repeat(3, axis = 1))
示例
import numpy as np输出结果importnumpy.maas ma
# Create an array with int elements using the numpy.array() method
arr = np.array([[55, 85, 59, 77], [67, 33, 39, 57], [29, 88, 51, 37], [56, 45, 99, 85]])
print("Array...\n", arr)
print("\nArray type...\n", arr.dtype)
# Get the dimensions of the Array
print("\nArray Dimensions...\n",arr.ndim)
# Create a masked array and mask some of them as invalid
maskArr = ma.masked_array(arr, mask =[[1, 1, 0, 0], [ 0, 0, 1, 0],
[0, 0, 0, 1], [0, 1, 0, 0]])
print("\nOur Masked Array\n", maskArr)
print("\nOur Masked Array type...\n", maskArr.dtype)
# Get the dimensions of the Masked Array
print("\nOur Masked Array Dimensions...\n",maskArr.ndim)
# Get the shape of the Masked Array
print("\nOur Masked Array Shape...\n",maskArr.shape)
# Get the number of elements of the Masked Array
print("\nElements in the Masked Array...\n",maskArr.size)
# To repeat elements of a masked array, use the ma.MaskedArray.repeat() method in Numpy
# The "repeats" parameter sets the number of repetitions for each element.
# The repeats is broadcasted to fit the shape.
# The "axis" parameter is the axis along which to repeat values.
# By default, use the flattened input array, and return a flat output array.
# The axis value set to 1
print("\nResult...\n",maskArr.repeat(3, axis = 1))
Array...[[55 85 59 77]
[67 33 39 57]
[29 88 51 37]
[56 45 99 85]]
Array type...
int64
Array Dimensions...
2
Our Masked Array
[[-- -- 59 77]
[67 33 -- 57]
[29 88 51 --]
[56 -- 99 85]]
Our Masked Array type...
int64
Our Masked Array Dimensions...
2
Our Masked Array Shape...
(4, 4)
Elements in the Masked Array...
16
Result...
[[-- -- -- -- -- -- 59 59 59 77 77 77]
[67 67 67 33 33 33 -- -- -- 57 57 57]
[29 29 29 88 88 88 51 51 51 -- -- --]
[56 56 56 -- -- -- 99 99 99 85 85 85]]
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