sample1 <- c(9,9,24,24,27,27,39,45,54,54,54,57,57,57,57,66,66,69,75,81,90,102,105,108,120,120,123)
我怎么能这样做(9,0,15,0,3,0 ...)等等?这个程序叫什么?
答案 0 :(得分:5)
diff
将会这样做。 (请注意,您需要预先设置0
来“拾取”第一步,从0到9。)
diff(c(0, sample1))
# [1] 9 0 15 0 3 0 12 6 9 0 0 3 0 0 0 9 0 3 6
# [20] 6 9 12 3 3 12 0 3