如何分割数据帧？

Question

如何分割数据帧？

我想把一个数据帧分成几个小的。这看起来是一个非常琐碎的问题，但是我无法从网络搜索中找到解决方案。

Answer 1

你也可以用data2 <- data[data$sum_points == 2500, ]这将生成一个带有sum_point=2500的值的数据它规定：airfoils sum_points field_points&nbsp; &nbsp;init_t contour_t&nbsp; &nbsp;field_t...491&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5625 0.000086&nbsp; 0.004272&nbsp; 6.321774498&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5625 0.000087&nbsp; 0.004507&nbsp; 6.325083504&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;5625 0.000088&nbsp; 0.004370&nbsp; 6.336034603&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp; 250&nbsp; &nbsp; &nbsp; &nbsp; 10000 0.000072&nbsp; 0.000525&nbsp; 1.111278577&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp; 250&nbsp; &nbsp; &nbsp; &nbsp; 10000 0.000104&nbsp; 0.000559&nbsp; 1.111431587&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp; 250&nbsp; &nbsp; &nbsp; &nbsp; 10000 0.000072&nbsp; 0.000528&nbsp; 1.111524606&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp; 250&nbsp; &nbsp; &nbsp; &nbsp; 10000 0.000079&nbsp; 0.000538&nbsp; 1.111685....> data2 <- data[data$sum_points == 2500, ]> data2airfoils sum_points field_points&nbsp; &nbsp;init_t contour_t&nbsp; &nbsp;field_t108&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 625 0.000082&nbsp; 0.004329&nbsp; 0.733109106&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 625 0.000102&nbsp; 0.004564&nbsp; 0.733243117&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 625 0.000087&nbsp; 0.004321&nbsp; 0.733274112&nbsp; &nbsp; &nbsp; &nbsp; 5&nbsp; &nbsp; &nbsp; &nbsp;2500&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 625 0.000081&nbsp; 0.004428&nbsp; 0.733587