我在R中有一个数据框,如下所示:
head(span_data)
FECHA....DIA.Cá01TMax.Cá01HTMax.Cá01TMin.Cá01HTMin.Cá01TMed.Cá01HumMax.Cá01HumMin.Cá01HumMed.Cá01VelViento.Cá01DirViento.Cá01Rad.Cá01Precip.Cá01ETo
1 -------- --- -------- --------- -------- --------- -------- ---------- ---------- --- ------- ------------- ------------- ------- ---------- -------
2 21-05-12 142 21.0 15:08 9.1 5:28 15.3 91.9 45.2 72.3 2.2 270.2 30.0 0.0 4.81
3 20-05-12 141 19.1 15:12 11.3 4:50 14.6 94.9 46.6 74.4 2.6 273.0 23.2 12.6 4.0
4 19-05-12 140 22.6 14:26 14.8 23:50 18.5 92.6 36.3 66.5 3.7 250.1 24.9 0.4 5.29
5 18-05-12 139 23.4 14:30 17.2 23:58 19.4 87.4 55.5 72.0 3.1 …