Fri 14 Oct 2011 03:04:40 PM UTC, original submission:
The attached script and image reproduce my error.
What I do or don't expect:
1. Maybe my understanding of the theory or the octave commands is hazy, but all the figures/matrices I'm trying to plot are real matrices. Why, then, when I calculate the log of such a matrix, do I get imaginary numbers back?
In other words, I don't expect the message:
"warning: imshow: only showing real part of complex image"
2. A larger, concern, however, is why the command on line 16 doesn't run properly. Why doesn't this command work, when the three similar ones before it do?
3. The command seems to work when I manually calculate the limits for the imshow parameter. But I was expecting more from the resulting image than a uniform grey picture. Again, problem with octave, or my understanding of the theory?
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Here are the details of my system, running on an HP EliteBook 8560w:
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