how can i use a loop to run the specific code

Question

Joydeb Saha 2022-4-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1699005-how-can-i-use-a-loop-to-run-the-specific-code

评论： Joydeb Saha 2022-5-10

If there are number of datafiles in the current folder, how can i use a loop to run the specific code? attaching the code. the folder name is 2002. and data file names are 200201,200202,200203 etc. I need a single matrix giving the Q values for all the data files.

data_Wwind=netcdf('E:\data\2002\200201.nc');  %  input address of data folder
cot=data_Wwind{'M2TMNXRAD_5_12_4_TAUHGH'}(:);
th5 = cot > 5;
B = double(th5);
Q=sum(B(:) == 1);

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Answer 1

KSSV 2022-4-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1699005-how-can-i-use-a-loop-to-run-the-specific-code#answer_945010

在 MATLAB Online 中打开

ncFiles = dir('E:\data\2002\*.nc')
N = length(ncfiles) ; 
Q = zeros(N,1) ; 
for i = 1:N
    ncFile = fullfile(ncFiles(i).folder,ncFiles(i).name) ; 
    cot=data_Wwind{'M2TMNXRAD_5_12_4_TAUHGH'}(:);
    th5 = cot > 5;
    B = double(th5);
    Q(i)=sum(B(:) == 1);
end

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KSSV 2022-4-18

在 MATLAB Online 中打开

This is not a problem.....you can do it...

data_Wwind=netcdf(ncFile);

Joydeb Saha 2022-5-10

在 MATLAB Online 中打开

ncFiles = dir('E:\data\2002\*.nc');
N = length(ncFiles) ; 
Q = zeros(N,1) ; 
for i = 1:N
    ncFile = fullfile(ncFiles(i).folder,ncFiles(i).name) ; 
    data_Wwind=netcdf(ncFile); 
    cot=data_Wwind{'M2TMNXRAD_5_12_4_TAUHGH'}(:);
    th5 = cot > 3;
    B = double(th5);
    Q(i)=sum(B(:) == 1);
end

I have used this code to find the total number of pixels those are above threshold 3 for all the data files in the folder. How can I find the mean value of cot for all the data files only for the pixels those are above threshold three(3)?

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