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Help with contour of a matrix

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aurc89
aurc89 on 24 Apr 2014
Closed: MATLAB Answer Bot on 20 Aug 2021
I have to plot a bidimensional map of a matrix using 'contour', and what I obtain is plotted in figure.
The problem is that in this way I have discrete lines, while I need to see a continuum between minimum and maximum values, with a gradual change of colors, with no blank spaces. Is it possible to do that? Maybe using a function different from 'contour'? Thanks!

Answers (1)

Doubutsu
Doubutsu on 24 Apr 2014
I have about the same kind of image if I try to use contour on my data. Instead I plotted it using 'imagesc'. It works good enough for me (since I just want to see something), but I don't know if it is what you are looking for.
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aurc89
aurc89 on 24 Apr 2014
Edited: aurc89 on 24 Apr 2014
Thank you, now it looks better! Just one question: by using imagesc the image is not at the same position, because the vertical axis is reversed, while I prefer not to reverse it. How can I do it? In the figures below you can see what I mean (the first one is obtained by using contour, the second one with imagesc)
Chad Greene
Chad Greene on 25 Jun 2014
Indeed, imagesc will flip your data vertically. So you'll need to do imagesc(flipud(yourData)). Alternatively, you could use pcolor(yourData).

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