[GRASS-SVN] r66955 - in grass-addons/grass7/raster: r.mregression.series r.series.filter
svn_grass at osgeo.org
svn_grass at osgeo.org
Fri Nov 27 18:34:24 PST 2015
Author: DmitryKolesov
Date: 2015-11-27 18:34:24 -0800 (Fri, 27 Nov 2015)
New Revision: 66955
Modified:
grass-addons/grass7/raster/r.mregression.series/r.mregression.series.html
grass-addons/grass7/raster/r.series.filter/r.series.filter.html
Log:
Update documentation
Modified: grass-addons/grass7/raster/r.mregression.series/r.mregression.series.html
===================================================================
--- grass-addons/grass7/raster/r.mregression.series/r.mregression.series.html 2015-11-28 02:24:21 UTC (rev 66954)
+++ grass-addons/grass7/raster/r.mregression.series/r.mregression.series.html 2015-11-28 02:34:24 UTC (rev 66955)
@@ -17,19 +17,18 @@
<h2>NOTES</h2>
-The number of maps in <em>X</em> and <em>Y</em> must be
-identical (see examples below).
+The number of predictor variables (<em>X</em> maps) need to be the same in
+each (time) series (see examples bellow). If the different time series have irregular
+time intervals, NULL raster maps can be inserted into time series to
+make time intervals equal.
<p>
The list of inputs for each cell (including NULLs) is passed to the
regression function. The functin compute the parameters over the
non-NULL values, producing a NULL result only if there aren't enough
non-NULL values for computing.
-<p>
-Linear regression requires an equal number of <em>X</em> and
-<em>Y</em> maps. If the different time series have irregular
-time intervals, NULL raster maps can be inserted into time series to
-make time intervals equal.
+
+
<h2>EXAMPLES</h2>
The most important paramether is <em>samples</em>, it provides the list
of <em>X</em> and <em>Y</em> maps. The parameter is the name of csv file
@@ -52,11 +51,11 @@
</pre></div>
"ndvi_t" are names of the NDVI rasters, "precip_t" are names
of precipitation rasters. The names of the first and the
-second variables are "elevation" and "precipitation" accordingly.
+second predictor variables are "elevation" and "precipitation" accordingly.
<p>
The second paramether is <em>result_prefix</em>. It is used for
-coefficient names construction. For example if result_prefix="coef.",
-the names of the regression coefficient names are "coef.elevation"
+construction of the coefficient names. For example if result_prefix="coef.",
+the names of the regression coefficients are "coef.elevation"
and "coef.precipitation".
<div class="code"><pre>
@@ -87,7 +86,7 @@
<h3>EXAMPLE 1</h3>
We create test data for the example. Suppose we have five <em>Y</em> maps and
-5 pairs of <em>X</em> = <em>(x1, x2)</em> maps.
+5 pairs of predictor <em>X</em> = <em>(x1, x2)</em> maps.
<p>
Create <em>X</em> variables (random numbers):
<div class="code"><pre>
@@ -105,7 +104,7 @@
r.mapcalc -s "x52 = rand(0, 20)"
</pre></div>
<p>
-Create constant raster for intercept:
+Create constant raster for the intercept:
<div class="code"><pre>
r.mapcalc "ones = 1.0"
@@ -125,7 +124,7 @@
<p>
So we have five test rasters <em>Y</em> and <em>X</em>.
Forget for a moment that we know the function and try
-to find the coeffitinents.
+to find the coeffitients.
<p>
Create <em>samples</em> csv file:
<div class="code"><pre>
Modified: grass-addons/grass7/raster/r.series.filter/r.series.filter.html
===================================================================
--- grass-addons/grass7/raster/r.series.filter/r.series.filter.html 2015-11-28 02:24:21 UTC (rev 66954)
+++ grass-addons/grass7/raster/r.series.filter/r.series.filter.html 2015-11-28 02:34:24 UTC (rev 66955)
@@ -54,7 +54,7 @@
<h2>SEE ALSO</h2>
-<em><a href="addons/r.mregression.series.html">r.regression.series</a></em>,
+<em><a href="addons/r.regression.series.html">r.regression.series</a></em>,
<em><a href="r.series.html">r.series</a></em>,
<em><a href="r.regression.line.html">r.regression.line</a></em>,
<em><a href="g.list.html">g.list</a></em>,
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