Hi:
Here's a simple example that you can tune to your needs:
m <- matrix(rpois(100, 10), nrow = 10)
# Function to compute summary statistics:
f <- function(x) c(min = min(x), med = median(x), mean = mean(x), max =
max(x))
# Apply to rows (index 1)
apply(m, 1, f)
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
min 5.0 7.0 5.0 6.0 5.0 5.0 8.0 5.0 2.0 6.0
med 11.5 9.5 10.0 9.5 9.0 8.0 10.0 10.0 6.0 10.0
mean 11.1 9.8 10.4 10.3 9.6 7.6 10.5 9.3 6.6 9.8
max 15.0 14.0 17.0 15.0 17.0 10.0 14.0 14.0 16.0 12.0
# Apply to columns (index 2)
apply(m, 2, f)
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
min 3.0 6.0 5.0 6.0 2.0 5.0 5.0 5.0 8.0 6.0
med 9.0 9.5 11.0 9.5 8.5 9.5 9.0 6.0 10.5 10.0
mean 8.6 9.6 10.8 9.8 8.5 9.7 9.7 7.8 11.0 9.5
max 12.0 15.0 15.0 17.0 14.0 15.0 17.0 14.0 16.0 14.0
HTH,
Dennis
On Fri, Sep 17, 2010 at 9:08 AM, Halabi, Anan <[email protected]> wrote:
> I made simulation with Weibull and create Matrix,
> How can I create mean/min/max/stdev on column or rows of matrix?,
> Thanks,
>
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