Python的NumPy使用之数组过滤

import numpy as np
arr = np.array([61, 62, 63, 64, 65])
x = [True, False, True, False, True]
newarr = arr[x]
print(newarr)

import numpy as np
arr = np.array([61, 62, 63, 64, 65])
# 创建一个空列表
filter_arr = []
# 遍历 arr 中的每个元素
for element in arr:
  # 如果元素大于 62，则将值设置为 True，否则为 False：
  if element > 62:
    filter_arr.append(True)
  else:
    filter_arr.append(False)
newarr = arr[filter_arr]
print(filter_arr)
print(newarr)

import numpy as np
arr = np.array([1, 2, 3, 4, 5, 6, 7])
# 创建一个空列表
filter_arr = []
# 遍历 arr 中的每个元素
for element in arr:
  # 如果元素可以被 2 整除，则将值设置为 True，否则设置为 False
  if element % 2 == 0:
    filter_arr.append(True)
  else:
    filter_arr.append(False)
newarr = arr[filter_arr]
print(filter_arr)
print(newarr)

import numpy as np
arr = np.array([61, 62, 63, 64, 65])
filter_arr = arr > 62
newarr = arr[filter_arr]
print(filter_arr)
print(newarr)

import numpy as np
arr = np.array([1, 2, 3, 4, 5, 6, 7])
filter_arr = arr % 2 == 0
newarr = arr[filter_arr]
print(filter_arr)
print(newarr)