[R] VARIANCE across each ROW
ggrothendieck at gmail.com
Sun Apr 2 15:21:25 CEST 2006
# test data
x <- matrix(rnorm(24), 6) # 6x4 matrix
sd(t(x))^2 #  0.5631489 1.9047905 0.7813566 0.7415535 0.4992331 1.7095818
# same but generates an intermediate 6x6 matrix
# so less desirable if real matrix has large number of rows
On 4/1/06, mark salsburg <mark.salsburg at gmail.com> wrote:
> I have a very large matrix. I would like to display the variance across each
> In other words, I want to output a vector containing the values of variance
> across row.
> When I use the function var(), it seems to give me the variability of each
> Any ideas??
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