On Mon, 2008-06-16 at 14:50 -0700, Taylor, Z Todd wrote:
> I generally do something like
>
> storage.mode(my.matrix) <- "double"
Ahh, that's what I was missing; I was side tracked by working out why I
couldn't write an S3 method for as.double for matrices, and missed the
proper solution in th
thanks for your correction Gavin. i read ?data.matrix and neglected to
pay attention to the last line of the description:
"Factors and ordered factors are replaced by their internal codes".
On Mon, Jun 16, 2008 at 5:30 PM, Gavin Simpson wrote:
On Mon, 2008-06-16 at 15:35 -0500, [EMAIL PR
une 16, 2008 2:31 PM
> To: [EMAIL PROTECTED]
> Cc: r-help@r-project.org
> Subject: Re: [R] Annoyance in as.numeric
>
> On Mon, 2008-06-16 at 15:35 -0500, [EMAIL PROTECTED] wrote:
> > hi: you can do below but i don't know if it's worth it ?
> >
> > newx <-
On Mon, Jun 16, 2008 at 4:22 PM, Alberto Monteiro wrote:
> Why does as.numeric convert matrices and arrays to vectors?
>
Because that's what it's documented to do!
" as.numeric is a generic function, but S3 methods must be written for
as.double. It is identical to as.double (and as.real). "
A
On Mon, 2008-06-16 at 15:35 -0500, [EMAIL PROTECTED] wrote:
> hi: you can do below but i don't know if it's worth it ?
>
> newx <- data.matrix(data.frame(x))
> print(newx)
That doesn't work Mark:
> str(data.frame(x))
'data.frame': 2 obs. of 2 variables:
$ X1: Factor w/ 2 levels "1","2": 1 2
hi: you can do below but i don't know if it's worth it ?
newx <- data.matrix(data.frame(x))
print(newx)
On Mon, Jun 16, 2008 at 4:22 PM, Alberto Monteiro wrote:
Why does as.numeric convert matrices and arrays to vectors?
as.numeric(matrix(c("1", "2", "3", "4"), 2, 2))
[1] 1 2 3 4
I could
Why does as.numeric convert matrices and arrays to vectors?
as.numeric(matrix(c("1", "2", "3", "4"), 2, 2))
[1] 1 2 3 4
I could only figure out ugly ways to bypass this, like:
x <- matrix(c("1", "2", "3", "4"), 2, 2)
array(as.numeric(x), dim = dim(x), dimnames = dimnames(x))
Alberto Monteiro
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