이 오류 메시지의 근본 원인은 month
컬럼의 범주 성격이다
In [42]: flights.dtypes
Out[42]:
year int64
month category
passengers int64
dtype: object
In [43]: flights.month.cat.categories
Out[43]: Index(['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'], d
type='object')
당신은 카테고리 total
을 추가하려고 - 팬더 그런 식으로하지 않습니다.
해결 방법 : 당신이 flights_unstacked
DF에 범주 열을 제거 할 수있는 원래의 DF를 터치하지 않으 양자 택일 경우 :이
In [45]: flights.month.cat.add_categories('total', inplace=True)
In [46]: x = flights.pivot(index='year', columns='month', values='passengers')
In [47]: x['total'] = x.sum(1)
In [48]: x
Out[48]:
month January February March April May June July August September October November December total
year
1949 112.0 118.0 132.0 129.0 121.0 135.0 148.0 148.0 136.0 119.0 104.0 118.0 1520.0
1950 115.0 126.0 141.0 135.0 125.0 149.0 170.0 170.0 158.0 133.0 114.0 140.0 1676.0
1951 145.0 150.0 178.0 163.0 172.0 178.0 199.0 199.0 184.0 162.0 146.0 166.0 2042.0
1952 171.0 180.0 193.0 181.0 183.0 218.0 230.0 242.0 209.0 191.0 172.0 194.0 2364.0
1953 196.0 196.0 236.0 235.0 229.0 243.0 264.0 272.0 237.0 211.0 180.0 201.0 2700.0
1954 204.0 188.0 235.0 227.0 234.0 264.0 302.0 293.0 259.0 229.0 203.0 229.0 2867.0
1955 242.0 233.0 267.0 269.0 270.0 315.0 364.0 347.0 312.0 274.0 237.0 278.0 3408.0
1956 284.0 277.0 317.0 313.0 318.0 374.0 413.0 405.0 355.0 306.0 271.0 306.0 3939.0
1957 315.0 301.0 356.0 348.0 355.0 422.0 465.0 467.0 404.0 347.0 305.0 336.0 4421.0
1958 340.0 318.0 362.0 348.0 363.0 435.0 491.0 505.0 404.0 359.0 310.0 337.0 4572.0
1959 360.0 342.0 406.0 396.0 420.0 472.0 548.0 559.0 463.0 407.0 362.0 405.0 5140.0
1960 417.0 391.0 419.0 461.0 472.0 535.0 622.0 606.0 508.0 461.0 390.0 432.0 5714.0
UPDATE가
In [76]: flights_unstacked.columns = \
...: flights_unstacked.columns \
...: .set_levels(flights_unstacked.columns.get_level_values(1).categories,
...: level=1)
...:
In [77]: flights_unstacked['passengers','total'] = flights_unstacked.sum(axis=1)
In [78]: flights_unstacked
Out[78]:
passengers
month January February March April May June July August September October November December total
year
1949 112 118 132 129 121 135 148 148 136 119 104 118 1520
1950 115 126 141 135 125 149 170 170 158 133 114 140 1676
1951 145 150 178 163 172 178 199 199 184 162 146 166 2042
1952 171 180 193 181 183 218 230 242 209 191 172 194 2364
1953 196 196 236 235 229 243 264 272 237 211 180 201 2700
1954 204 188 235 227 234 264 302 293 259 229 203 229 2867
1955 242 233 267 269 270 315 364 347 312 274 237 278 3408
1956 284 277 317 313 318 374 413 405 355 306 271 306 3939
1957 315 301 356 348 355 422 465 467 404 347 305 336 4421
1958 340 318 362 348 363 435 491 505 404 359 310 337 4572
1959 360 342 406 396 420 472 548 559 463 407 362 405 5140
1960 417 391 419 461 472 535 622 606 508 461 390 432 5714
인가 거기에 내가 unstacked 버전과 함께 할 수있는 방법은? 아니면 원래 비행을 편집해야합니까? flights_usntacked.dtypes에는 dtypes – Mathephysicist
@Mathephysicist 카테고리가 없기 때문에 UPDATE 섹션을 확인하십시오. – MaxU