On Mon, 2007-11-26 at 09:25 -0800, Bricklemyer, Ross S
wrote:> All,
>
> I have been using a data set to build pls models for three different
> soil properties. Two of the three models run fine; however I receive
> the following error for the final model.
>
> > libs.IC.cal <- mvr(libs.IC.fmla, data = libsdata.cond.cal,
> ncomp=20,validation = "LOO", method = "oscorespls")
>
> Error in colMeans(x, n, prod(dn), na.rm) :
> 'x' must be numeric
>
> There are many "0" for this soil property. Could this cause the
> error?
Without having the data (or a small example therefore) it is impossible
to tell.
To start, try str(libsdata.cond.cal) and check that the variables
referenced in your formula object (which is what I presume libs.IC.fmla
is?) are all numeric and haven't got coded as factors or characters or
something strange.
G
>
> Best,
> Ross
>
> *******************************************************************
> Ross Bricklemyer
> Dept. of Crop and Soil Sciences
> Washington State University
> 291D Johnson Hall
> PO Box 646420
> Pullman, WA 99164-6420
> Work: 509.335.3661
> Cell/Home: 406.570.8576
> Fax: 509.335.8674
> Email: rsb at wsu.edu
>
>
>
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