What does this say? Error in rep("(Intercept)", nrow(a0)) : invalid 'times' argument

Thomas, thanks for the cool trick.  I always thought browser() was the
only thing existed, apparently not.

Mike

On Sat, May 25, 2013 at 9:09 PM, Thomas Stewart
<tgs.public.mail at gmail.com> wrote:

Mike-

You can use the traceback function to see where the error is:

 bob <- matrix(rnorm(100*180), nrow=180)
 yyy <- rnorm(180)
 fit1 <- cv.glmnet(bob, yyy, family="mgaussian")

Error in rep("(Intercept)", nrow(a0)) : invalid 'times' argument

 traceback()

6: predict.multnet(object, newx, s, type, exact, offset, ...)
5: predict.mrelnet(glmnet.object, type = "nonzero")
4: predict(glmnet.object, type = "nonzero")
3: lapply(X = X, FUN = FUN, ...)
2: sapply(predict(glmnet.object, type = "nonzero"), length)
1: cv.glmnet(bob, yyy, family = "mgaussian")

So, thee error is in the predict.multnet function.  If you peak at that
function, you see where the function falls apart.  It seems that the
function wants a0 to be a matrix but in this example it is a vector.  I'm
not familiar enough with the package to offer advice on how to fix this.

-tgs



On Sat, May 25, 2013 at 4:14 PM, C W <tmrsg11 at gmail.com> wrote:

Dear list,
I am using glmnet.  I have no idea what this error is telling me.
Here's my code,

bob <- matrix(rnorm(100*180), nrow=180)
yyy <- rnorm(180)
fit1 <- cv.glmnet(bob, yyy, family="mgaussian")

Error in rep("(Intercept)", nrow(a0)) : invalid 'times' argument

In fact, I peeked inside cv.glmnet() using,

glmnet:cv.glmnet

Can't even find the error message in the code.  I am clueless at the
moment.
Thanks in advance,
Mike