比较和过滤 NumPy 数组
原文:https://www . geeksforgeeks . org/comparison-and-filtering-numpy-array/
在本文中，我们将看到如何对 NumPy 数组进行比较和过滤。
比较 NumPy 数组:
让我们看看将在比较 NumPy 数组时使用的比较运算符–
-
大于(>)或 numpy.greater().
-
Equal (= =) or unequal (! =) or numpy.not_equal ().
- Greater than or equal to (> =).
- Is less than (< =).
【NumPy 数组比较步骤:
步骤 1: 首先在您的系统或环境中安装 NumPy。通过使用以下命令。
pip install numpy(command prompt)
!pip install numpy(jupyter)
第二步:导入 NumPy 模块。
import numpy as np
步骤 3: 使用 NumPy Array 方法创建元素数组。
np.array([elements])
步骤 4: 现在使用比较运算符来比较 NumPy 数组。
示例 1:
- Import NumPy module.
- Use numpy.array () method to create an array.
- Now use the greater () method to compare two arrays.
Python 3
# importing NumPy Module
import numpy as np
# Creating Array
a = np.array([1,2,3,4])
b = np.array([3,8,5,6])
# Comparing two arrays
np.greater(a, b)
输出:
array([False, False, False, False])
例 2:
- 导入 NumPy 模块。
- 使用 numpy.array()方法创建数组。
- 现在使用 less()方法比较两个数组。
Python 3
# Importing NumPy Module
import numpy as np
# Creating Array using NumPy
a = np.array([1, 2, 3, 4])
b = np.array([3, 8, 5, 6])
np.less(a, b)
输出:
array([ True, True, True, True])
示例 3:
- Import NumPy module.
- Use numpy.array () method to create an array.
- Now use the equal () method to compare two arrays.
Python 3
# Importing NumPy Module.
import numpy as np
# Create Arrays using np.array() Function.
a = np.array([1, 2, 3, 4])
b = np.array([3, 8, 5, 6])
# Compare a and b array elements
# if the elements in a and b are equal
# it returns True else returns False.
np.equal(a, b)
输出:
array([ False, False, False, False])
示例 4:
- Import NumPy module.
- Use numpy.array () method to create an array.
- Now use the not_equal () method to compare two arrays.
Python 3
# Importing NumPy Module.
import numpy as np
# Create Arrays using np.array() Function.
a = np.array([1, 2, 3, 4])
b = np.array([3, 8, 5, 6])
# Compare a and b array elements if the
# elements in a and b are not equal
# it returns True else returns False.
np.not_equal(a, b)
输出:
array([ True, True, True, True])
例 5:
- Import NumPy module.
- Use numpy.array () method to create an array.
- Now use the > = operator to compare two arrays.
Python 3
# Importing NumPy Module.
import numpy as np
# Create Arrays using np.array()
# Function.
a = np.array([1, 2, 3, 4])
b = np.array([3, 8, 5, 6])
# it returns if elements in a are
# greater than a equal to b
print(a >= b)
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