thanks ï¼now i reduce the number of the descriptors, It is ok.
å¨2010-01-03ï¼"Max Kuhn [via R]"
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å件人:"Max Kuhn [via R]"
åéæ¶é´:2010å¹´1æ3æ¥ æææ¥
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主é¢:Re: [R] Please help me Error in `[.data.
thanks,
I have reduce the number of descriptors, and the erroe is none, my major
is qsar, but what is the criterion to select descritors, and how many
descriptors should be selected, It is a problem, I calculate my descriptors
troungh E-dragon, and apply the wonderful package caret,but my re
Your data set has 217 predictors and 166 samples. If you read the
vignette on feature selection for this package, you'll see that the
default ranking mechanism that it uses for linear models requires a
linear model fit. The note that:
> prediction from a rank-deficient fit may be misleading
s
I am learning the package "caret", after I do the "rfe" function, I get the
error ,as follows:
Error in `[.data.frame`(x, , retained, drop = FALSE) :
undefined columns selected
In addition: Warning message:
In predict.lm(object, x) :
prediction from a rank-deficient fit may be misleading
I
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