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Say, I have dataset

mydat=structure(list(x1 = structure(c(2L, 3L, 4L, 5L, 1L), .Label = c("", 
"a", "b", "c", "d"), class = "factor"), x2 = structure(1:5, .Label = c("a", 
"b", "c", "d", "e"), class = "factor")), .Names = c("x1", "x2"
), class = "data.frame", row.names = c(NA, -5L))

x1 has values a,b,c,d
x2 has values a,b,c,d,e

how can I display the values that there is in x2 var, but there is not in x1? In our case this is e-value

as output I desire

    Value
1   e

If this question is duplicate, please let me know, I'll delete it.

Dave2e
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psysky
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1 Answers1

1

We can try 

setdiff(mydat$x2,mydat$x1)
[1] "e"
A. Suliman
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