[R] Error message in function mars() in package mda
juderyan at tcindex.com
Tue Aug 10 21:56:38 CEST 2004
I am using function mars() in package mda to find knots in a whole bunch
of predictor variables. I hope to be able to replicate all or some of
the basis functions that the MARS software from Salford Systems creates.
When I ran mars() on a small dataset, I was able to get the knots.
However, when I tried running mars() on a larger dataset (145 predictor
variables), for a different project, I get the following error message:
> fit1 <- mars(disney2[,-146], disney2[,146])
Error in mars(disney2[, -146], disney2[, 146]) :
NA/NaN/Inf in foreign function call (arg 5)
In addition: Warning messages:
1: NAs introduced by coercion
2: NAs introduced by coercion
Does arg 5 refer to the 5th column in my dataset? This seems to be a
data problem, is this correct?
Are there any other functions in R that will give me the knots for a set
of predictor variables?
Any help is greatly appreciated.
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