How to overlay two gridded datasets?

2021 5 19
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更新时间：2021 5 20
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I have two datasets one is New_SDN : x*y*z (lat, lon, data1) and
another one is no2regrid : x*y*m (lat, lon, data2).
Datasets are having only one time frame.
no2regrid have one of 4 categorical values (1/2/3/4)in every grid.
I want to find no2regrid dataset - category1 values in New_SDN dataset

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NEHA SINGH
NEHA SINGH 2021-5-20

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one of my research colleague resolved the issue.
And I want to share the answer.
To find data out values of no2regrid with respect to New_SDN.
First one need to find out index values of different classes of New_SDN data i.e., 0/ 1 / 2/ 3. and then find those values in no2regrid data. I am writing code below for thye same-
idx= find(New_SDN==0);
NO2SD0=no2regrid(idx);
clear idx
idx= find(New_SDN==1);
NO2SD1=no2regrid(idx);
clear idx
idx= find(New_SDN==2);
NO2SD2=no2regrid(idx);
clear idx
idx= find(New_SDN==3);
NO2SD3=no2regrid(idx);
clear idx

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