Data extraction from multiple matfiles.

Question

Shimelis Asfaw Wakigari 2019-2-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446167-data-extraction-from-multiple-matfiles

评论： Shimelis Asfaw Wakigari 2019-2-23

SM1.mat

Hello,

The following script loads all the files. The example of data is attached. I want to extract data for specific row and col for all the files i have (i.e., SM1,SM2,SM3,SM3). So i want code at commented place below in the script.

FileInfo=dir('SM*.mat');
for k= 1:length(FileInfo)
    fileName=['SM' num2str(k)];
    dataStruct.(fileName)=load([fileName '.mat']);
    % This the place i want to have the way of extracting a pixel for all matfiles.
end

Thanks

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KSSV 2019-2-21

How is the data stored in mat file? YOu extract the variable you want.

Kevin Chng 2019-2-22

It is better if you could upload the mat file here, and state what variable you want to extract.

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Answer 1

Kevin Chng 2019-2-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446167-data-extraction-from-multiple-matfiles#answer_362187

Your Question:

I want to extract data for specific row and col for all the files i have (i.e., SM1,SM2,SM3,SM3).

For example, if you want to extract row 1 and column 2 from the variable in the mat file. Let assume that SM1 has variable sm1, SM2 has variable sm2,......

FileInfo=dir('SM*.mat');
for k= 1:length(FileInfo)
    fileName=['sm' num2str(k)];
    dataStruct=load(FileInfo(k).name);
    % This the place i want to have the way of extracting a pixel for all matfiles.
    dataStruct.(fileName)(1,2)
end