Recomendation on plotting data

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Jaime de la Mota 2017-5-17

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https://ww2.mathworks.cn/matlabcentral/answers/340762-recomendation-on-plotting-data

评论： Walter Roberson 2017-5-18

I have a 360x180 matrix with data for each latitude and longitude on earth, I plot it like this:

imagescnan(loni,lati,squeeze(double(r4_sat(:,:)))')

I have another matrix with the same dimensions but only data on the points in which it is significative; I want to mark the locations on the map plotted earlier in which the data is significative but I don't know how.

Any sugestion helps Thanks for reading

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Walter Roberson 2017-5-18

在 MATLAB Online 中打开

Note:

imagescnan(loni,lati,squeeze(double(r4_sat(:,:)))')

should be the same as

imagescnan( loni, lati, double(r4_sat).' )

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Answer 1

Walter Roberson 2017-5-18

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https://ww2.mathworks.cn/matlabcentral/answers/340762-recomendation-on-plotting-data#answer_267437

在 MATLAB Online 中打开

   imagescnan( loni, lati, double(r4_sat).' );
   hold on
   threshold = 0.05;                     %for example
   mask = double(r4_sat > threshold);    %was it significant?
   mask(mask == 0) = nan;                %1 if significant, nan if not
   imagescnan( loni, lati, mask.' );