Full_Name: Michael Spiegel
Version: 2.9.0
OS: linux
Submission from: (NULL) (204.111.252.142)
The diag() function appears to reject the first argument when it is a matrix,
and nrow and ncol arguments are also provided.
> foo <- matrix(c(1:4),2,2)
> foo
[,1] [,2]
[1,] 1 3
[2,] 2 4
> diag(foo)
[1] 1 4
> diag(foo, 2, 2)
Error in diag(foo, 2, 2) : first argument is array, but not matrix.
> is.matrix(foo)
[1] TRUE
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