[GRASS-SVN] r57727 - grass/branches/releasebranch_6_4/imagery/i.pca

[svn_grass at osgeo.org]

Author: neteler
Date: 2013-09-17 03:55:09 -0700 (Tue, 17 Sep 2013)
New Revision: 57727

Modified:
   grass/branches/releasebranch_6_4/imagery/i.pca/description.html
Log:
i.pca manual: NC example from trunk; refer to Wiki article

Modified: grass/branches/releasebranch_6_4/imagery/i.pca/description.html
===================================================================
--- grass/branches/releasebranch_6_4/imagery/i.pca/description.html	2013-09-17 10:53:51 UTC (rev 57726)
+++ grass/branches/releasebranch_6_4/imagery/i.pca/description.html	2013-09-17 10:55:09 UTC (rev 57727)
@@ -1,6 +1,5 @@
 <h2>DESCRIPTION</h2>
 
-
 <em>i.pca</em> is an image processing program based on the
 algorithm provided by Vali (1990), that processes n
 (n >= 2) input raster map layers and produces n output
@@ -47,16 +46,20 @@
 
 <h2>EXAMPLE</h2>
 
-Using the Spearfish Imagery sample dataset
+Using Landsat imagery in the North Carolina sample dataset:
 
 <div class="code"><pre>
-i.pca in=spot.ms.1,spot.ms.2,spot.ms.3 out=spot_pca
+i.pca in=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 \
+    out=lsat7_2002_pca
 
-r.info -h spot_pca.1
+r.info -h lsat7_2002_pca.1
    Eigen values, (vectors), and [percent importance]:
-   PC1   1170.12 ( -0.63 -0.65 -0.43 ) [ 88.07% ]
-   PC2    152.49 (  0.23  0.37 -0.90 ) [ 11.48% ]
-   PC3      6.01 (  0.75 -0.66 -0.08 ) [  0.45% ]
+   PC1   4334.35 ( 0.2824, 0.3342, 0.5092,-0.0087, 0.5264, 0.5217) [83.04%]
+   PC2    588.31 ( 0.2541, 0.1885, 0.2923,-0.7428,-0.5110,-0.0403) [11.27%]
+   PC3    239.22 ( 0.3801, 0.3819, 0.2681, 0.6238,-0.4000,-0.2980) [ 4.58%]
+   PC4     32.85 ( 0.1752,-0.0191,-0.4053, 0.1593,-0.4435, 0.7632) [ 0.63%]
+   PC5     20.73 (-0.6170,-0.2514, 0.6059, 0.1734,-0.3235, 0.2330) [ 0.40%]
+   PC6      4.08 (-0.5475, 0.8021,-0.2282,-0.0607,-0.0208, 0.0252) [ 0.08%]
 </pre></div>
 
 
@@ -67,22 +70,24 @@
 Springer-Verlag, 1986.
 
 <p>
-
 Vali, Ali R.,
 Personal communication,
 Space Research Center, 
 University of Texas, Austin, 1990.
 
 <p>
-
 <em>
-<a href="i.cca.html">i.cca</a><br>
-<a href="i.class.html">i.class</a><br>
-<a href="i.fft.html">i.fft</a><br>
-<a href="i.ifft.html">i.ifft</a><br>
-<a href="m.eigensystem.html">m.eigensystem</a><br>
-<a href="r.covar.html">r.covar</a><br>
+<a href="i.cca.html">i.cca</a>,
+<a href="i.class.html">i.class</a>,
+<a href="i.fft.html">i.fft</a>,
+<a href="i.ifft.html">i.ifft</a>,
+<a href="m.eigensystem.html">m.eigensystem</a>,
+<a href="r.covar.html">r.covar</a>,
 <a href="r.mapcalc.html">r.mapcalc</a>
+<p>
+<em>
+<a href="http://grasswiki.osgeo.org/wiki/Principal_Components_Analysis">Principal Components Analysis article</a>
+(GRASS Wiki)
 </em>