I think you may be correct.
I've manage to get the data into a format that the function accepts.
The error appears to be because I have negative values in my data:
Error in apply(safeNormCDF(s), 1, prod) :
dim(X) must have a positive length
On 10/16/09 1:51 AM, Philipp Pagel wrote:
On Fri, Oct 16, 2009 at 01:33:14AM -0700, Noah Silverman wrote:
Hi,
I'm experimenting with a few learners that require a matrix as their
input. (Currently svmpath, vbmp, etc.)
I currently have a dataframe with 50 columns and 20,000 rows.
I tried using:
x<- as.matrix(my_data.frame)
If I then as, "is.matrix(x)", I get TRUE.
However everywhere I've tried to use the matrix returns errors.
Without more information I can't even start to guess what is going
wrong. Please give a short, reproducible example of what you did and
what errors you encountered.
as.matrix() should suffice for creating a matrix from a data.frame :
foo<- data.frame(1:4, 4:1, sqrt(1:4), log(4:1))
foo
X1.4 X4.1 sqrt.1.4. log.4.1.
1 1 4 1.000000 1.3862944
2 2 3 1.414214 1.0986123
3 3 2 1.732051 0.6931472
4 4 1 2.000000 0.0000000
det(foo)
Error in UseMethod("determinant") :
no applicable method for "determinant"
det(as.matrix(foo))
[1] -0.1092489
So probably your problem is somewhere else.
cu
Philipp
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