Automate the code for data extraction

Question

Debayan Mandal 2022-9-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1812290-automate-the-code-for-data-extraction

评论： Mathieu NOE 2022-10-24

I have multiple files of satellite data . Need to extract the data for a particular lat and lon. I have write the code for single data . Needs to run the code for all the files existing in the folder . The names of the files are :

g4.timeAvgMap.OMNO2d_003_ColumnAmountNO2TropCloudScreened.20190516-20220531.71E_19N_93E_47N

g4.timeAvgMap.OMNO2d_003_ColumnAmountNO2TropCloudScreened.20190401-20190415.70E_17N_76E_22N

The code i have written :

clear all;

close all;

clc;

filename='Delhi test.nc'

no2=ncread(filename, 'OMNO2d_003_ColumnAmountNO2TropCloudScreened');

longitude=ncread(filename,'lon');

latitude=ncread(filename,'lat');

[x1,y1]=meshgrid(longitude,latitude);

[r1,c1]=find(x1==77.3750);

[r2,c2]=find(y1==28.6250);

cc=no2(r1(1),c2(1))

Needs to modify the code so that this could be run in multiple files and data (which will be point data for each file ) can be stored by different variable names

Thanks in advance .

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Answer 1

Mathieu NOE 2022-9-26

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1812290-automate-the-code-for-data-extraction#answer_1061015

在 MATLAB Online 中打开

hello

you can try this :

folder= pwd; % put here folder where wav files are
C=dir(fullfile(folder,'*.nc')); %list all nc files in folder
nFiles=numel(C);
for i= 1:nFiles
    
    % load new data
    filename = C(i).name;
    no2=ncread(filename, 'OMNO2d_003_ColumnAmountNO2TropCloudScreened');
    longitude=ncread(filename,'lon');
    latitude=ncread(filename,'lat');
    [x1,y1]=meshgrid(longitude,latitude);
    [r1,c1]=find(x1==77.3750);
    [r2,c2]=find(y1==28.6250);
    cc{i}=no2(r1(1),c2(1));
    
end