Automatically loading the .mat file

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Prasad Joshi 2022-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/1640560-automatically-loading-the-mat-file

评论： Prasad Joshi 2022-2-9

I am working on following code .In the code I am manually loading the matlab file .But know the cases are increases to 27 mat files. can someone help me in automating the process means automatically loading the matlab file from a specific folder and then storing in the excel file .Can someone please help me this . Thank you in advance . Automatically loading means loading the file from the specific folder . without manually loading . For eg in folder ABC I have mat file AAA.mat , BBB.mat , CCC.mat ...So first AAA.mat should load then store the data in excel file (the code that I used) , then BBB.mat & so on ... Thanks in advance

filenames={'AAA.mat','BBB.mat','CCC.mat'}
n = numel(filenames) ; 
A = zeros([],n) ; 
for i = 1:numel(filenames)
    load(filenames{i})
    
    CO= CO_sim_mass_cum;
    NOx=NOx_sim_mass_cum;
    nmHC= nmHC_sim_mass_cum;
    
    for j = 1:length(CO)
        A(j,i) = THC(j);
    end
    for k= 1:length(NOx)
        B(k,i)=NOx(k);
    end 
    for l= 1:length(nmHC)
        C(l,i)=nmHC(l);
    end
end
xlswrite('e.xlsx',[A,B,C])

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采纳的回答

Walter Roberson 2022-2-2

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https://ww2.mathworks.cn/matlabcentral/answers/1640560-automatically-loading-the-mat-file#answer_886765

在 MATLAB Online 中打开

dinfo = dir('*.mat');
filenames = {dinfo.name};

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Prasad Joshi 2022-2-3

dinfo = dir('*.mat');

filenames = {dinfo.name};

filenames_sort=natsortfiles(filenames)

n = numel(filenames_sort) ;

A = zeros([],n) ;

for i=1:numel(filenames_sort)

load(char(filenames_sort(i)))

end

detail code if anyone needed .. Thank you Walter & Yongjian san for your support

Prasad Joshi 2022-2-9

walter sir can you answer the below question .. Thank you in advance

https://in.mathworks.com/matlabcentral/answers/1646110-scatter-plot-adding-string-in-x-axis?s_tid=srchtitle

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更多回答（1 个）

Yongjian Feng 2022-2-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1640560-automatically-loading-the-mat-file#answer_886300

在 MATLAB Online 中打开

For "automatically loading", you most likely mean generating the file names in a loop?

Try this:

num_case = 26;
files={};
for i=1:num_case
    filename = ['C1_H1_C2_case' num2str(i) '_WLTC_']; % something else at the end? Not shown in the attached screenshot
    files{end+1} = filename;
end