[R] factanal error

[John Fox]

Dear william,

There must be at least one perfect collinearity (within the numerical
accuracy of the computation) among the variables in mydataN; this is not
surprising given that there are apparently 923 variables for 982
observations. Do you really want to do an exploratory factor analysis for
923 variables?

John

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
> Behalf Of onyourmark
> Sent: April-20-09 7:48 PM
> To: r-help at r-project.org
> Subject: [R] factanal error
> 
> 
> Hi. I tried running the following code. I don't understand the error.
> 
> mydata <- read.table("C:/dataForR/radiology/wordFrequencies.csv",
> header=TRUE, sep=",")
> 
> > dim(mydata)
> [1] 982 924
> mydataN<-mydata[,-923]
> > dim(mydataN)
> [1] 982 923
> 
> cor(mydataN)
> factanal(mydataN, factors=3)
> 
> 
> Error in solve.default(cv) :
>   Lapack routine dgesv: system is exactly singular
> 
> Thank you for looking at this!
> --
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> tp23147009p23147009.html
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