How to remove noise from radio data

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S N RAY 2012-7-19

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https://ww2.mathworks.cn/matlabcentral/answers/44024-how-to-remove-noise-from-radio-data

I am working with a matrix array. When plotted with pcolor;shading interp it shows some necessary features and also some unnecessary noise in the form of fixed frequency radio noise. How can such noise be removed while retaining the feature.I have used the following code.But it is not helpful in removing the noise.I do not know how to upload the actual data in this forum.

data = fitsread('filename.fit');%data is a 200x3600 array.
dataNaN = sum(isnan(data));
mudata = mean(data);
sigmadata = std(data);
Mudata = repmat(mudata,200,1);
Sigmadata = repmat(sigmadata,200,1);
outliers = (data - Mudata) > 2*Sigmadata;
data(outliers) = NaN;
figure(2);pcolor(data);shading interp