[GRASSLIST:4523] Re: filter out extrem values

[Gordon Keith]

On Tue, 17 Sep 2002 16:24, Gordon Keith wrote:

> I now have a version of s.univar that has an option to generate a
> site file with one site for each cell in the current region (as per
> s.windavg) each site having 13 attributes (from univar): mean, count,
> standard deviation, coefficient of variation, skewness, kurtosis,
> mean of squares, mean of absolute values, minimum, first quartile,
> median, third quartile and maximum.


> It's extremely slow.

It's now not too bad. 

It took 16 minutes and 370MB RAM to generate statistics for a file with 
16,167,136 sites in a 1667 x 2846 region and writing a file with 
1,861,651 sites on a 1.7GHz processor.


> If anyone's interested I can send them a copy.
>
> Regards
> Gordon

-- 

Gordon Keith
Programmer/Data Analyst
Marine Acoustics
CSIRO Marine Research
http://www.marine.csiro.au

"I think there is a world market for maybe five computers"
- Thomas Watson, Chairman of IBM, 1943