<div dir="ltr"><font color="#708090">Hello! i'm trying to validate my IDW model for field values of pH (and other parameters) using the following:</font><div><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)"><code class="gmail-language-python" style="box-sizing:inherit;background:none;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;word-break:normal;line-height:1.5"><span class="gmail-token gmail-comment" style="box-sizing:inherit;color:slategray"># Partition sample points in 4 groups</span>
Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.kcv"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> map<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHsr"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> npartitions<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">4</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> column<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"part"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span></code></pre></div><div><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)"><code class="gmail-language-python" style="box-sizing:inherit;background:none;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;word-break:normal;line-height:1.5">Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.extract"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> flags<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"r"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> input<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHsr"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> output<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHcalibration"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span>
where<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"part=1"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span>
Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.extract"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> input<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHsr"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> output<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHvalidation"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span>
where<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"part=1"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span></code></pre></div><div><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)"><code class="gmail-language-python" style="box-sizing:inherit;background:none;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;word-break:normal;line-height:1.5">Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.surf.idw"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> input<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHcalibration"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> column<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pH_values"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span>
npoints<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">12</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> power<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">2</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> output<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pH_CAL_idw"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span></code></pre></div><div><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)"><code class="gmail-language-python" style="box-sizing:inherit;background:none;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;word-break:normal;line-height:1.5">Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.what.rast"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> map<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHvalidation"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> raster<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHsr"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span>
column<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"actual"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span>
Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"v.what.rast"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> map<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pHvalidation"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> raster<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"pH_CAL_idw"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> column<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"Estimated"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span></code></pre></div><div><font color="#708090">Things work pretty good so far, i obtained a vector with the actual values and the estimated ones, the next step would be to evaluate the root mean square error for this routine. (Eventually i also want to loop the idw estimation for different set of Validation and Calibration groups).</font></div><div><font color="#708090"><b style="">So far i haven't used the script but instead i used the GUI interface for every single comand (v.kcv, v.extract, v.surf.idw and v.what.rast).</b></font></div><div><font color="#708090">For the following section i wanted to use a script but i have trouble working it, as stats is 'not defined'. </font></div><div><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)"><code class="gmail-language-python" style="box-sizing:inherit;background:none;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;word-break:normal;line-height:1.5">sqlstat <span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span> <span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"SELECT actual,estimated FROM pHvalidation"</span>
stats <span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span> Module<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"db.select"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> flags<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"c"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> sql<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span>sqlstat<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span>
stdout_<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span>PIPE<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>outputs<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>stdout
stats <span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span> stats<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>replace<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"\n"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> <span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"|"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">[</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">:</span><span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">-</span><span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">1</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">]</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>split<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"|"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span>
stats <span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span> <span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span>np<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>asarray<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">[</span>float<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span>x<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span> <span class="gmail-token gmail-keyword" style="box-sizing:inherit;color:rgb(0,119,170)">for</span> x <span class="gmail-token gmail-keyword" style="box-sizing:inherit;color:rgb(0,119,170)">in</span> stats<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">]</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> dtype<span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-string" style="box-sizing:inherit;color:rgb(102,153,0)">"float"</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">.</span>
reshape<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span>len<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">(</span>stats<span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-operator" style="box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">/</span><span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">2</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">,</span> <span class="gmail-token gmail-number" style="box-sizing:inherit;color:rgb(153,0,85)">2</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-punctuation" style="box-sizing:inherit;color:rgb(153,153,153)">)</span></code></pre><pre class="gmail-language-python gmail-line-numbers" style="box-sizing:inherit;color:rgb(0,0,0);margin-top:0.5em;margin-bottom:0.5em;font-size:14px;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;line-height:1.5;background:rgb(248,248,255);word-break:normal;padding:1em 1em 1em 3.8em;overflow:auto;border:1px solid rgb(223,223,223)">rsme <span class="gmail-token gmail-operator" style="word-spacing:normal;box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span style="background-color:initial;word-spacing:normal"> np</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">.</span><span style="background-color:initial;word-spacing:normal">sqrt</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">(</span><span style="background-color:initial;word-spacing:normal">np</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">.</span><span style="background-color:initial;word-spacing:normal">mean</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">(</span><span style="background-color:initial;word-spacing:normal">np</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">.</span><span style="background-color:initial;word-spacing:normal">diff</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">(</span><span style="background-color:initial;word-spacing:normal">stats</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">,</span><span style="background-color:initial;word-spacing:normal"> axis</span><span class="gmail-token gmail-operator" style="word-spacing:normal;box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">=</span><span class="gmail-token gmail-number" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,0,85)">1</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-operator" style="word-spacing:normal;box-sizing:inherit;color:rgb(166,127,89);background:rgba(255,255,255,0.5)">**</span><span class="gmail-token gmail-number" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,0,85)">2</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">)</span><span class="gmail-token gmail-punctuation" style="background-color:initial;word-spacing:normal;box-sizing:inherit;color:rgb(153,153,153)">)</span></pre></div><div>I tried to run the GUI for db.select specifing in the sql SELECT= <span style="color:rgb(102,153,0);background-color:initial;font-family:Consolas,Monaco,"Andale Mono","Ubuntu Mono",monospace;word-spacing:normal;font-size:14px">SELECT actual,estimated FROM pHvalidation".</span></div><div>I obtained in the output of the GUI the right selected values, but i don't know how to procede calculating the RMSE value, when i try to run the script above, stats stay as 'not defined'. Also i was expecting a vector with two columns* with my selected values as an output of the GUI, but i dont know if and where such file is been saved. </div><div><span style="color:rgb(112,128,144)">I guess that the line ''stats= Module(''db.select'', flags=''c'', sql=sqlstat, stdout_=PIPE).outputs.stdout" is required for define ''stats'' but must be missing the reference to ''stats'' somewhere before that. </span><br></div><div><span style="color:rgb(112,128,144)">Is it possible that i just have to create a vector with the column im trying to select and named that vector ''stats''? </span></div><div><span style="color:rgb(112,128,144)"><br></span></div><div><span style="color:rgb(112,128,144)"><br></span></div><div><span style="color:rgb(112,128,144)">*I get the idea that the output of the GUI is providing me the right values but i dont know how to create a vector from that output to call it ''stats'' and procede with the script.</span></div><div><span style="color:rgb(112,128,144)"><br></span></div><div><font color="#708090">I hope that i was able to explain the issue properly, i may be missing something simple because i'm not an expert at all in using Gis GRASS, especially when it comes to writing scripts. </font></div><div><font color="#708090">Thanks in advance,</font></div><div><font color="#708090">FS.</font></div><div><span style="color:rgb(112,128,144)"><br></span></div></div>