removing matrix element based on quality flag

2015 6 1
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更新时间：2015 6 1
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i have a Netcdf file which includes 150*32024 density matrix and also 150*32024 quality flag matrix (elements of quality flag consist of numbers 1,2,3, ...), that shows the quality of density matrix elements. i want to exclude(replace it by NaN) elements of density matrix related to the quality flag elements equal or greater than 2, how can i do this? Thanks

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Image Analyst
Image Analyst 2015-6-1

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Try this, using logical indexing:
densityMatrix(qualityMatrix >= 2) = nan;

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