Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL|Language|Variables">Variables</a><hr>
<H5>Subscripts</H5>
It is possible to access the grey level values and attribute data
for adjacent pixels by subscripting layer or attribute variables.
The following diagram shows the subscript syntax and relationship to
the pixel being currently processed (which is [ 0, 0]).
<P>
<PRE>
                [-1,-1]  [ 0,-1]  [ 1,-1]
                [-1, 0]  [ 0, 0]  [ 1, 0]
                [-1, 1]  [ 0, 1]  [ 1, 1]
</PRE>
Examples: %1.2[-1,-1], %1[1,1]<p>
%x is equivalent to %x[0,0]. Subscripted pixels which are outside
the bounds of the image are automatically assigned the value of the
nearest pixel which is inside the image.<p>
Note: it is NOT possible to assign a value to a subscripted pixel.
<P>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/MODEL|Language|Variables">Variables</a><br>
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