How to resolve the following error: (list) object cannot be coerced to type 'double'
On Wed, Sep 12, 2012 at 4:04 PM, Jason Love <jason.love1492 at gmail.com> wrote:
Hello,
I'd like to test a significance of two variables in their correlation using
rcorr, which gave me an error of format incompatibility.
Below are the lines that I typed in the R window and let me know if anyone
knows how to resolve this.
Var=read.csv("03apr10ab_corr_matrix_in_overlaps.csv",header=F)
colnames(Var)=c("D Prime","T statistics")
D Prime T statistics
1 1.7234e-01 4.926800
2 1.4399e-01 2.892000
3 1.4626e-01 2.642800
4 3.5147e-02 1.112400
5 5.8957e-02 2.723700
rcorr(Var, type="pearson")
Untested (because I'm still without respectable internet after a move) I believe rcorr would rather have a matrix than a data.frame(), which is what read.csv produces, so try Var <- as.matrix(Var) or rcorr(as.matrix(Var), type = "pearson")
Error in storage.mode(x) <- if (.R.) "double" else "single" : (list) object cannot be coerced to type 'double'
This suggests that the input to rcorr is being converted to a double, which isn't a valid storage.mode change for a list (= data frame). Cheers, M
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