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<p>Dear Kenneth</p>
<p>db.execute might be an option to fill a new column with what you
want. I am not an SQL expert, but I suppose it is possible to
concatenate the right strings if you do it for each order
separately and count the number of currents first.</p>
<p>Cheers, <br>
</p>
<p>Mira<br>
</p>
<div class="moz-cite-prefix">On 10/12/2020 17.15, Kenneth Roy
Cabrera Torres wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAH1GdN2UoUtdGH=-Jv9ASz8dB9gCnB9LASKRrei0NWibRkP3hQ@mail.gmail.com">
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<div dir="ltr">Dear GRASS users:<br>
<br>
Can you give any suggestions to solve this problem?<br>
<br>
I have an ordered dataset of segments of river currents output
from r.stream.order command.<br>
I will like to add a column to this dataset that identifies each
current according to Horton ordering.<br>
I mean it actually identifies the Horton number. But what I want
to do is to separate each <br>
Horton current from each order. For example, if I have, say 4
Horton currents of order 5,<br>
then I will like to have an additional column that identifies
each Horton current (5-1, 5-2, ..., 5-4).<br>
<br>
I try with v.build.polyline and indeed it separates the
individual currents of the same<br>
Horton order. But I don't know how to incorporate that new cat
ID to the current segments' dataset.<br>
<br>
Thank you for your help.<br>
<div><br>
</div>
-- <br>
<div dir="ltr" data-smartmail="gmail_signature">Kenneth Roy
Cabrera Torres<br>
Cel 315 504 9339</div>
</div>
<br>
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</blockquote>
<pre class="moz-signature" cols="72">--
Dr. Mira Kattwinkel
Quantitative Landscape Ecology
iES Landau, Institute for Environmental Sciences
University of Koblenz-Landau
Fortstraße 7
76829 Landau
Germany
Phone: + 49 6341 280-31553
Office: Building I, Room 2.02</pre>
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