r - 根据条件从r中的多个列中删除重复的行

Question

我有一个数据集，我想删除在4个不同的列中具有重复信息的数据行。

foo<- data.frame(g1 = c("1","0","0","1","1"), v1 = c("7","5","4","4","3"), v2 = c("a","b","x","x","e"), y1 = c("y","c","f","f","w"), y2= c("y","y","y","f","c"), y3 = c("y","c","c","f","w"), y4= c("y","y","f","f","c"), y5=c("y","w","f","f","w"), y6=c("y","c","f","f","w"))

foo然后看起来像:

  g1 v1 v2 y1 y2 y3 y4 y5 y6
1  1  7  a  y  y  y  y  y  y
2  0  5  b  c  y  c  y  w  c
3  0  4  x  f  y  c  f  f  f
4  1  4  x  f  f  f  f  f  f
5  1  3  e  w  c  w  c  w  w

现在，我想删除所有基于Y1-6列重复数据的行。因此，根据所有Y变量完全相同的情况，如果正确完成，则仅删除第4行和第1行。它是多列条件。

我相信我已经接近了，但是它不能正常工作。

我试过了: new = foo[!(duplicated(foo[,1:6]))]在考虑使用重复的命令来搜索并仅找到完全匹配的命令？

我曾想过将＆用作条件语句，但也无法弄清楚该怎么做。 new = foo[foo$y1==foo$y2|foo$y3|foo$y4|foo$y5|foo$y6]
我想到了哪个，但我现在不知所措，迷失了方向。我希望foo看起来像:

   g1 v1 v2 y1 y2 y3 y4 y5 y6
2  0  5  b  c  y  c  y  w  c
3  0  4  x  f  y  c  f  f  f
5  1  3  e  w  c  w  c  w  w

Answer 1

> foo[apply(foo[ , paste("y", 1:6, sep = "")], 1,
            FUN = function(x) length(unique(x)) > 1 ), ]
  g1 v1 v2 y1 y2 y3 y4 y5 y6
2  0  5  b  c  y  c  y  w  c
3  0  4  x  f  y  c  f  f  f
5  1  3  e  w  c  w  c  w  w