[R] computing the mean of a few variables

[Tobias Verbeke]

sigalit mangut-leiba wrote:

> I want to compute the average of 6 variables,
> my data looks like this:
> 
>     t0    t1   t2    t3   t4   t5
> 1  32   34  36   40   38  40
> 2  35   37  38   36   33  39
> .
> .
> .
> I want the mean of t0-t5 for each row (observation).

If your data are available in a matrix mymat,
you can use

apply(mymat, 1, mean) # see ?apply

or (more efficient)

rowMeans(mymat)

HTH,
Tobias


> thank you,
> sigalit.
> 
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