Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/CLWORKS|Accuracy+Assessment">Accuracy Assessment</a><hr>
<H4>Generate Random Sample</H4>
The ``Generate Random Sample'' panel adds new random samples to the 
existing list of samples shown in the main Accuracy 
Assessment panel. Random samples from several sources can be merged. 
This panel has two areas.<p>
The ``Number of Samples'' section has a
slider bar and text field to specify the number of
random samples to generate and add.<p>
The ``Options'' section is used to set sampling control options and 
has two questions which must be answered ``Yes'' or ``No'' using radio 
buttons. ``Yes'' is the default answer to both questions. The questions 
are:<p>
Include only existing Classes?
<P>
<UL>
<LI> If ``Yes'', then random samples are generated only for classes in the
class list.  
<LI> If ``No'', then random samples are generated for all classes (including the
null class). 
</UL>
Stratify Samples to Class Percentages?
<P>
<UL>
<LI> If ``Yes'', then the percentage of random samples generated for each class 
will approximate the percentage of classified pixels in each class. 
Larger classes will contain more samples than smaller classes. 
<LI> If ``No'', then the samples are completely random, which leaves room for 
the possibility that some classes may not have any samples at all. 
</UL>
The panel has three action button along the bottom.
<P>
<UL>
<LI> Accept: This button creates random samples and closes the panel.
<LI> Cancel: This button closes panel without generating random samples.
<LI> Help: This button displays this help information. 
</UL>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/CLWORKS|Accuracy+Assessment">Accuracy Assessment</a><br>
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