how can i use a loop to run the specific code

2022 4 18
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更新时间：2022 5 10
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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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KSSV
KSSV 2022-4-18

0 个投票

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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Joydeb Saha
Joydeb Saha 2022-4-18
Here data_Wwind is undefined. Can we make data_Wwind run for each of the data files and have the Q?
KSSV
KSSV 2022-4-18
It seems you have to extract it from netcdf file.....You have not specified it in your question, how you have got that variable.
Joydeb Saha
Joydeb Saha 2022-4-18
data_Wwind=netcdf('E:\Cirrus Work\new\COTdata\2002\200208.nc'); % input address of data folder
This line to be inserted for all the files in the loop
Joydeb Saha
Joydeb Saha 2022-4-18
I have mentioned that variable in the first line.
KSSV
KSSV 2022-4-18
This is not a problem.....you can do it...
data_Wwind=netcdf(ncFile);
Joydeb Saha
Joydeb Saha 2022-5-10
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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