Python|熊猫 Panel.clip_lower()
在 Pandas 中,Panel 是一个非常重要的 3D 数据容器。 3 个轴的名称旨在为描述涉及面板数据的操作提供一些语义含义,特别是面板数据的计量经济学分析。
Panel.clip_lower()
函数用于返回输入值低于阈值的副本被截断。
Syntax: Panel.clip_lower(threshold, axis=None, inplace=False)
Parameters:
threshold : Minimum value allowed. All values below threshold will be set to this value.
float : every value is compared to threshold.
array-like : The shape of threshold should match the object it’s compared to.
axis : Align self with threshold along the given axis.
inplace : Whether to perform the operation in place on the data.
Returns: same type as input.
代码 #1:使用 from_dict() 创建面板
# importing pandas module
import pandas as pd
import numpy as np
df1 = pd.DataFrame({'a': ['Geeks', 'For', 'geeks'],
'b': np.random.randn(3)})
data = {'item1':df1, 'item2':df1}
# creating Panel
panel = pd.Panel.from_dict(data, orient ='minor')
print(panel, "\n")
输出:
代码 #2:使用 clip_lower()
# importing pandas module
import pandas as pd
import numpy as np
df1 = pd.DataFrame({'a': ['Geeks', 'For', 'geeks'],
'b': np.random.randn(3)})
data = {'item1':df1, 'item2':df1}
# creating Panel
panel = pd.Panel.from_dict(data, orient ='minor')
print(panel, "\n")
print(panel['b'], '\n')
df2 = pd.DataFrame({'b': [11, 12, 13]})
print(panel['b'].clip_lower(df2['b'], axis = 0))
输出:
代码#3:
# creating an empty panel
import pandas as pd
import numpy as np
data = {'Item1' : pd.DataFrame(np.random.randn(7, 4)),
'Item2' : pd.DataFrame(np.random.randn(4, 5))}
pen = pd.Panel(data)
print(pen['Item1'], '\n')
p = pen['Item1'][0].clip_lower(np.random.randn(7))
print(p)
输出: