On 06/07/2010 08:13, McLovin wrote:
Hi,
I am very new to R. I am hoping to create formulas and assign them to
locations within an array (or matrix, if it will work).
Here's a simplified example of what I'm trying to do:
form.arr<- array(31,5,3)
for (i in seq(from=1, to=31, by=1)) {
for (j in seq(from=1, to=5, by=1)) {
form.arr[i,j,]<- as.formula(y~1+2)
}
}
which results in this error:
Error in form.arr[i, j, ]<- as.formula(y ~ 1 + 2) :
incorrect number of subscripts
The reason I had made the 3rd dimension of the array size 3 is because
that's the length R tells me that formula is.
When I had tried to do this using a matrix, using this code:
form.mat<- matrix(31,5,3)
for (i in seq(from=1, to=31, by=1)) {
for (j in seq(from=1, to=5, by=1)) {
form.mat[i,j] = as.formula(y~1+2)
}
}
I was told:
Error in form.mat[i, j] = as.formula(y ~ 1 + 2) :
number of items to replace is not a multiple of replacement length
My question is: is it possible to assign formulas within a matrix or array?
If so, how? thanks....@real.com
You can create a matrix of mode list to do that.
An example is on page 39 of 'The R Inferno'.
--
Patrick Burns
pbu...@pburns.seanet.com
http://www.burns-stat.com
(home of 'Some hints for the R beginner'
and 'The R Inferno')
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