[R] rowVars

Uwe Ligges
Sat, 01 Apr 2006 14:14:17 -0000

r user wrote:

> I am using the R 2.2.1 in a Windows XP environment.
>
> I have a dataframe with 12 columns and 1,000 rows.
> (Some of the rows have 1 or fewer values.)

fewer than 1? So you mean 0?
Well, the commonly used estimator for the variance is defined for n>=2
elements only!


> I am trying to use rowVars to calculate the variance
> of each row.

I don't know a function rowVars in R-2.2.1 - and cannot find it ...

> I am getting the following message:
> ?Error in na.remove.default(x) : length of 'dimnames'
> [1] not equal to array extent?

Hard to tell without knowing what you actually did.

Uwe Ligges


>
> Is there a good work-around?
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!