Error in read.table: !header: invalid argument type

Question

I am having the strangest of issues. The following code no longer works:

Test<-matrix(rnorm(9),ncol=3)
 colnames(Test)<-c("a","b","c")
 write.table(Test,file="Test.txt")
 d<-read.table("Test.txt",header=T)

I get:

Error in !header: invalid argument type

I tried rebooting R, it didn't help.

Works fine with me, could you try `read.delim` if you get the same error? — Zbynek, Feb 14 '14 at 09:20

score 14 · Accepted Answer · answered Feb 14 '14 at 09:30

14

Check class(T). Most likely T was overwritten with a non-boolean value. Restart of R probably loads the saved session.

answered Feb 14 '14 at 09:30

Oleg Sklyar

As Oleg indicates, cleaning up your `.Rhistory` may be necessary. – flies Jan 17 '20 at 21:10
In my case `F` was overwritten by `function (x, n = 1, ...) UseMethod("F")` I used the full form `FALSE` as a quick fix – Isin Altinkaya May 18 '22 at 12:29

1 Answers1