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Contouring binary data [message #2198]

Wed, 01 June 1994 19:06

hahn
Messages: 108
Registered: November 1993

Senior Member

Hi all,

I have a matrix with binary data, that is the elements contain either zero or
one (or some other numer). If I convert the matrix from bytarr to fltarr and
call contour I get some but not all contour lines. Some of them are double
or triple lines. When I add ,levels=[0,1] I get single lines but miss even
more lines.

I guess, IDL assumes some analogue data and tries to find a "slope" or
a "gradient" but fails to get all non-zero elements.

The contour lines IDL returns are rather jaggy. How to smooth these lines ?

Is there a better algorithm for plotting binary data ?

Thanks for any help,
Norbert Hahn
Hahn@hrz.th-darmstadt.de

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