[R] Null values In R.

Dieter Menne dieter.menne at menne-biomed.de
Wed Dec 3 07:50:02 CET 2008

paul murima wrote:
> My problem is largely when i attempt to use correlation for my data...
> xcc <- cor(a);
> The  error i get is as follows
> Error in cor(a) : missing observations in cov/cor

As Daniel suggested, it is always best to use the function's parameter to
handle NULLs. In other cases, it could help to do 

a <- na.omit(a)

but be careful: this may throw away to many rows when you have more than 2


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