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Increasing contour levels non-linearly

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Huichen Zhang
Huichen Zhang 2016-11-8
评论： Huichen Zhang 2016-11-8
I am writing a CFD code. The output of the stream function contour shows this,
This is because at the two corners, the stream function value is almost 0.0001 level, or 0.00001, which are very small. I have shown the detailed values of the stream function in the excel attachment.
However, I want to get my stream function contour look like this,
Where the details at the two bottom corners are shown as well.
How should I achieve this?

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Brendan Hamm
Brendan Hamm 2016-11-8
You can control the levels which are displayed by using the syntax:
contour(Z,levels)
where Z is the data and levels define the contour levels. Likely you want to use log-spaced data and not linearly spaced (which contour uses by default).
levels = logspace(-5,-1,11); % 11 points from 10^-5 to 10^-1
contour(Z,levels)

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