相关疑难解决方法(0)

我有这样一个数据框:

df <- structure(list(a = c(NA, NA, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L), b = c(NA, NA, NA, 1L, 2L, 3L, 4L, 5L, 6L, 7L), d = c(NA, NA, NA, NA, 1L, 2L, 3L, 4L, 5L, 6L)), .Names = c("a", "b", "d"), row.names = c(NA, -10L), class = "data.frame")

> df
    a  b  d
1  NA NA NA
2  NA NA NA
3   1 NA NA
4   2  1 NA
5   3  2  1
6   4  3  2 …

我有一个这样的数据集

temp <- structure(list(col_1 = c("", "P9603", "", "", "11040", 
"80053"), col_2 = c("84484", "80061", "", "80061", "A0428", "85025"
), col_3 = c("V2632", "82310", "", "", "", "86357"), col_4 = c("J1170", 
"84305", "62311", "80061", "", ""), col_5 = c("", "86708", "J0690", 
"", "", "")), .Names = c("col_1", "col_2", "col_3", "col_4", 
"col_5"), class = c("data.table", "data.frame"))

   col_1 col_2 col_3 col_4 col_5
1:       84484 V2632 J1170      
2: P9603 80061 82310 84305 86708
3:                   62311 J0690
4:       80061       80061                        
5: 11040 A0428                  
6: …

我的数据集中有许多NA,我需要将所有这些单元格(在行级别)向左移动.

示例 - 我的数据帧:

    df=data.frame(x=c("l","m",NA,NA,"p"),y=c(NA,"b","c",NA,NA),z=c("u",NA,"w","x","y"))
    df
         x    y    z
    1    l <NA>    u
    2    m    b <NA>
    3 <NA>    c    w
    4 <NA> <NA>    x
    5    p <NA>    y

我希望上面的数据帧转换成这个:

      x    y  z
    1 l    u NA
    2 m    b NA
    3 c    w NA
    4 x <NA> NA
    5 p    y NA

请帮忙.

谢谢.