Dear all
?Hmisc::rcorr states that it takes as main argument "a numeric
matrix". But is it normal that it fails in such an ugly way on a data
frame? (See below.) If the function didn't attempt any conversion to a
matrix, I would have expected it to state that in the error message
that it didn't accept 'data.frame' objects in its input. Also, I
vaguely remember having used in the past rcorr() on data frames.
Regards
Liviu
> require(Hmisc)
> rcorr(mtcars[ , 1:4])
Error in storage.mode(x) <- if (.R.) "double" else "single" :
(list) object cannot be coerced to type 'double'
> rcorr(as.matrix(mtcars[ , 1:4]))
mpg cyl disp hp
mpg 1.00 -0.85 -0.85 -0.78
cyl -0.85 1.00 0.90 0.83
disp -0.85 0.90 1.00 0.79
hp -0.78 0.83 0.79 1.00
n= 32
P
mpg cyl disp hp
mpg 0 0 0
cyl 0 0 0
disp 0 0 0
hp 0 0 0
--
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