How to smooth this contourf plot?

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Subhodh Sharma
Subhodh Sharma 2022-3-23
评论： Mathieu NOE 2022-3-24
Hello everyone,
I want to plot smooth contour filled data with the given data. I have tried this code.
h1=contourf(X1,X2,DATA1,'edgecolor','none');
shading interp;
with this I am getting this plot. But I want a smooth plot. I would really appreciate your help. Thanks in advance.
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Subhodh Sharma
Subhodh Sharma 2022-3-23
@Bjorn Gustavsson I am not familiar witb filtering. But we can use filtering if it solves the issue. only thing is that I need to show all portion of Indian region without cut-offs of any region.
thanks for your response. looking forward to your inputs.
Bjorn Gustavsson
Bjorn Gustavsson 2022-3-23
The underlying problem might be the data you have in DATA1, if I simply do:
imagesc(DATA1)
and zoom in on the Kashmir(?) region it looks very peculiar, some kind of mixture between rasterized data and interpolated data on varying spatial resolution. The answer by Mathieu below looks nice to my eyes, if they are a suitable presentation of the data is for you to judge.

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Mathieu NOE
Mathieu NOE 2022-3-23
hello
with this FEx submission, you should be happy now
smooth2a - File Exchange - MATLAB Central (mathworks.com)
DATA2 = smooth2a(DATA1,10,10); % adapt the smoothing amount to your needs...
figure(2)
h2=contourf(X1,X2,DATA2,'edgecolor','none');
results

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