我有一个大数据框,它包含以开尔文为单位的温度。我想把所有的温度数据转换成摄氏度。我找不到任何做一次减法的例子
这是我的数据框:
Antwerp Busan Colombo Dalian Guangzhou Hamburg Hong Kong Jebel Ali/Dubai Kaohsiung Laem Chabang ... Rotterdam Shanghai Shenzhen Singapore Tanjung Pelepas Tanjung Priok/Jakarta Tianjin Xiamen Yingkou
time
1990-01-01 00:00:00 273.70395 279.31912 298.03195 268.42200 285.93228 271.31534 290.31357 289.83023 292.94135 298.48724 ... 274.18726 279.60450 288.37366 298.10950 298.23816 299.37143 272.06094 285.92570 265.19046
1990-01-01 01:00:00 273.72702 279.94266 298.02042 268.18445 286.04940 271.18503 290.59730 289.69333 292.95950 298.01053 ... 274.12128 280.13235 288.59967 298.21176 298.40808 299.59576 272.04776 286.36612 265.10303
1990-01-01 02:00:00 273.47134 280.65198 298.40310 269.00925 286.67624 271.22790 291.18784 289.33700 293.10632 301.11172 ... 273.94310 282.45330 289.25455 298.39322 298.64725 300.08075 272.84616 287.74683 265.73150
我只想从每个城市列中减去273,而不包括时间列
程序员回答:
Call SetResizeable before pack,Call pack before setVisible,以及在您建立UI之后。使用实际已知的宽度和高度(getWidth和getHeight)值,而不是屏幕大小。宽度或屏幕大小。高度
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