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<div class="moz-cite-prefix">On 25-03-17 23:11, Laurent C. wrote:<br>
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<blockquote type="cite"
cite="mid:CABmXgEFD9s+5Ter0nNo27tOqjESrh75GbTjeY5D9FYHuxs0y6g@mail.gmail.com">
<div dir="auto">Hello,
<div dir="auto"><br>
</div>
<div dir="auto">If you need a fixed number of points, you might
do a while loop that randomly generate coordinates then add
the point only if the array is not null at those coordinates.</div>
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</blockquote>
<br>
Thanks, I'll give that a try. Will also see how this compares with
using r.random/r.what in terms of speed.<br>
<br>
<blockquote type="cite"
cite="mid:CABmXgEFD9s+5Ter0nNo27tOqjESrh75GbTjeY5D9FYHuxs0y6g@mail.gmail.com">
<div dir="auto">
<div dir="auto"><br>
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<div dir="auto">Laurent</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On 25 Mar 2017 13:55, "Paulo van
Breugel" <<a href="mailto:p.vanbreugel@gmail.com"
moz-do-not-send="true">p.vanbreugel@gmail.com</a>> wrote:<br
type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p style="margin:0 0 1em
0;color:black;font-family:sans-serif">On 25
March 2017 20:21:18 Luca Delucchi <<a
href="mailto:lucadeluge@gmail.com" target="_blank"
moz-do-not-send="true">lucadeluge@gmail.com</a>>
wrote:</p>
<p style="margin:0 0 1em
0;color:black;font-family:sans-serif">>
Il 25/mar/2017 20:07, "Paulo van Breugel" <<a
href="mailto:p.vanbreugel@gmail.com" target="_blank"
moz-do-not-send="true">p.vanbreugel@gmail.com</a>>
ha<br>
> scritto:<br>
><br>
> Hi,<br>
><br>
><br>
> Hi,<br>
><br>
><br>
> For a script I am working on, I am looking for a
way to select a X
number<br>
> of raster cells and their values into a numpy
array. I can create a
layer<br>
> with r.random, and read in that layer into a
numpy array, but I rather<br>
> avoid having to read in the whole raster layer. I
can also from within
the<br>
> script run r.random to generate a raster layer,
r.stats to
export the<br>
> resulting raster layer as a text file (with n
flag), and than read in
the<br>
> text file in Python. But I wonder if there is not
a more direct way to<br>
> accomplish this..<br>
><br>
><br>
> You can read col and row from GRASS Region and
use random python
function<br>
> to calculate random x and y and later query a
pygrass raster object<br>
></p>
<p style="margin:0 0 1em 0;color:black"><br>
Thanks. And what if I have a mask or null values in
the target raster.<br>
</p>
<p style="margin:0 0 1em
0;color:black;font-family:sans-serif"><br>
><br>
> Cheers,<br>
><br>
> Paulo<br>
><br>
><br>
> Cheers<br>
> Luca<br>
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