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 <anan.halabi@hp.com> 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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