Pandas 按时间值进行轴心排序-熊猫
我想透视aPandas 按时间值进行轴心排序-熊猫,pandas,pivot,Pandas,Pivot,我想透视adf并显示基于时间值的值,而不是列值 df = pd.DataFrame({ 'Place' : ['John','Alan','Cory','Jim','John','Alan','Cory','Jim'], 'Number' : ['2','3','5','5','3','4','6','6'], 'Code' : ['1','2','3','4','1','2','3','
df
并显示基于时间值的值,而不是列值
df = pd.DataFrame({
'Place' : ['John','Alan','Cory','Jim','John','Alan','Cory','Jim'],
'Number' : ['2','3','5','5','3','4','6','6'],
'Code' : ['1','2','3','4','1','2','3','4'],
'Time' : ['1904-01-01 08:00:00','1904-01-01 09:00:00','1904-01-02 01:00:00','1904-01-02 02:00:00','1904-01-01 08:10:00','1904-01-01 09:10:00','1904-01-02 01:10:00','1904-01-02 02:10:00'],
})
df = df.pivot_table(index = 'Number', columns = 'Place', values = 'Time', aggfunc = 'first').fillna('')
输出:
预期产出:
Place John Alan Cory Jim
Number
2 1904-01-01 08:00:00
3 1904-01-01 08:10:00 1904-01-01 09:00:00
4 1904-01-01 09:10:00
5 1904-01-02 01:00:00 1904-01-02 02:00:00
6 1904-01-02 01:10:00 1904-01-02 02:10:00
注意:我只添加了一个虚拟日期来区分午夜之后的时间。一旦
df
正确排序,我最终会删除日期,只留下时间 不幸的是,pivot_表
默认情况下对列名称进行排序,并且没有参数来避免它。因此,可能的解决方案是通过列Place
的原始唯一值:
#if necessary convert to datetimes and sorting
df['Time'] = pd.to_datetime(df['Time'])
df = df.sort_values('Time')
df1 = df.pivot_table(index='Number',columns='Place',values='Time',aggfunc='first').fillna('')
df1 = df1.reindex(columns=df['Place'].unique())
print (df1)
Place John Alan Cory \
Number
2 1904-01-01 08:00:00
3 1904-01-01 08:10:00 1904-01-01 09:00:00
4 1904-01-01 09:10:00
5 1904-01-02 01:00:00
6 1904-01-02 01:10:00
Place Jim
Number
2
3
4
5 1904-01-02 02:00:00
6 1904-01-02 02:10:00
#if necessary convert to datetimes and sorting
df['Time'] = pd.to_datetime(df['Time'])
df = df.sort_values('Time')
df1 = df.pivot_table(index='Number',columns='Place',values='Time',aggfunc='first').fillna('')
df1 = df1.reindex(columns=df['Place'].unique())
print (df1)
Place John Alan Cory \
Number
2 1904-01-01 08:00:00
3 1904-01-01 08:10:00 1904-01-01 09:00:00
4 1904-01-01 09:10:00
5 1904-01-02 01:00:00
6 1904-01-02 01:10:00
Place Jim
Number
2
3
4
5 1904-01-02 02:00:00
6 1904-01-02 02:10:00