Dear Hao,
It works for me. Here is my sessionInfo():

> sessionInfo()
R version 2.8.0 Patched (2008-11-08 r46864)
i386-pc-mingw32

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
States.1252;LC_MONETARY=English_United
States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods
base

other attached packages:
[1] glmnet_1.1-1       Matrix_0.999375-16 lattice_0.17-15    plotrix_2.5


Which version of R are you using?

HTH,

Jorge


On Wed, Dec 17, 2008 at 3:50 PM, Hao <haotang1982@gmail.com> wrote:

> Could any one help ? I start to learn the glmnet package. I tried with the
> example in the manual.
>
> x=matrix(rnorm(100*20),100,20)
> y=rnorm(100)
> fit1=glmnet(x,y)
>
>
> When I tried to fit the model, I received the error message:
>
> Error in validObject(.Object) :
>  invalid class "dgCMatrix" object: row indices are not sorted within
> columns
>
> Thank you very much!
>
> ______________________________________________
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