"Hoogerwerf, ir. M.R." wrote:
> I'm not sure I understand.
>
> I've got the following command file:
>
> ---Command file starts here----
> # Command file generated from Arcview for Zinc in c:\gstat\b45_65.eas
>
> set mv = '-1';
> data(zni15) : 'c:\gstat\b45_65.eas',x=1, y=2, v=4,I=15,max=20,average;
> variogram(zni15) : 0.18 Nug(0) + 0.08 Sph(1300);
>
> #mask: 'dg45_65';
> area: 'calc1';
> set order = 4;
>
> predictions(zni15) : 'zni15pr';
> ---Command file ends here----
>
> and I'd like to estimate the mean value for my irregular block.
>
> the command file above results in the following output:
>
> ---Output starts here ----
> gstat: Win32/Cygwin version 2.1.0 (August 1999)
> Copyright (C) 1992, 1999 Edzer J. Pebesma
> data(zni170): c:\gstat\b45_65.eas (GeoEAS file)
> attribute: I(Zn,170) [x:] X : [ 184076, 190220]
> n: [avgd. 2] 611 [y:] Y : [ 423498, 430449]
> sample mean: 0.91653 sample std.: 0.276818
> prediction centre at x=186435, y=426364, z=0 where x0 averages [1]
> area: (centred around 0)
> calc1 (ArcInfo gridfloat)
> attribute: calc1 [x:] x (map) : [ -2021.13, 3978.87]
> n: 71 [y:] y (map) : [ -2605.63, 3894.37]
> sample mean: 1 sample std.: 0
> data(): [at area centre] (ArcInfo gridfloat)
> attribute: calc1 [x:] x (map) : [ 186435, 186435]
> n: 1 [y:] y (map) : [ 426364, 426364]
> sample mean: 0 sample std.: 0
> [using ordinary kriging]
> gstat: variable not set: specify output file
> --- Output ends here ----
>
> I'm afraid I don't understand this output. Why does it say specify output
> file after saying prediction centre at ....?
gstat wants to know where it should write output to. Add a line:
set output = 'result.out';
> If I uncomment the mask part I get predictions for all discretisation point,
> where I only want the block mean value for the whole block.
That's what you get when leaving out the mask definition.
>
> I'm obviously doing smething wrong but I can't put my finger on it.
You're getting close.
--
Edzer
