MATLAB: All tables in the bracketed expression must have the same number of variables.

cell arraysMATLAB

I am importing 25 CSV files, each csv file is imported into a table, and then the table is vertically concatenated using vertcat(). This works fine in Matlab2020b, but when I run this on Matlab2015b, I get this error, here is my code as well
rpll=cell(1,data.numberofselected); %Table of all selected csv's ordered by run number aescending
x=cell(1, numel(dir(file_location))); 
for i=1:data.numberofselected
    concatenated=strcat(strcat(strcat(file_location,'RUN'),int2str(data.selected_runs(i))),'.csv');
    x{i}=readtable(concatenated);             
          
            
    end
disp(x)
rpll=vertcat(x{:});   %ERROR BEGINS HERE
All tables in the bracketed expression must have the same variable names.

Best Answer

Without knowing more about the .csv files, after reading them using readtable, use table2array to convert them to arrays, then vertically concatenate them. (I assume they all have the same number of columns, and only the variable names differ, and that is throwing the error.)
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