# MATLAB: Find the file that gives minimum standard deviation

data importerror

Hello,
I have written a piece of code in the following to select some files in order to find the difference between two dat files. So far, I have managed to take a standard difference between different files but my goal is to be able to find which file data gives the minimum error with respect to the reference data.
I am not sure how to proceed. Any help would be highly appreciated.
``ref_path='C:Desktop\prism\Au_707_G0_L880';ref_file = fullfile(ref_path,'*.dat'); ref_filelist= dir(ref_file); ref_filename = {ref_filelist.name};for l=1:numel(ref_filename)    ref_data(:,l)=load(ref_filename{l});endfile_path='C:\Desktop\prism\Au_707_G00_L880';file = fullfile(file_path,'*.dat');filelist=dir(file);k=1;for j=1:numel(ref_filelist)    for i =1:numel(filelist)        filenames={filelist.name};         if strfind(filenames{i}, '_RS')                       A(:,i)=load(filenames{i});                       diff(:,k)=ref_data(:,j)-A(:,i);            std_diff(:,k)=std(diff(:,k),1);            k=k+1;                  end            end  end``

• ``associated_files = {};for j=1:numel(ref_filelist)    for i =1:numel(filelist)        filenames={filelist.name};         if strfind(filenames{i}, '_RS')                       A(:,i)=load(filenames{i});                       data_diff(:,k)=ref_data(:,j)-A(:,i);            std_diff(:,k)=std(data_diff(:,k),1);            associated_files{k} = filenames{i};            k=k+1;                  end            end  end``
``err = sum(data_diff.^2);[best_err, erridx] = min(err);best_file = associated_files{erridx};``