vertical concatenation of matrices in a loop

I have a set of matrices saved in a data structure. I need to vertically concatenate the matrices. The number of columns is consistent for every matrix. how is it possible to do this in the loop i have written here. thanks

    for fileNr =1:8
     outputFileName = outputFileNames(fileNr);
    outputFileName = outputFileName{1};
    outputFileName = strcat(outputFolder, filesep, outputFileName);
    FileName=(outputFileName);
    FileName
    data1=load(FileName);
    data=data1.dataStruct.data;
    end

Answer 1

[Mischa Kim]

Yuvashree, try

 data = [];
 for fileNr = 1:8   
    [...]                  % removed code for better readability
    data1 = load(FileName);
    if (rem(fileNr,8)==0)  % save every 8th matrix
       data = [data; data1.dataStruct.data];
    end
 end

[Yuvashree Mani Urmila]

that works. Thanks for the help. what should be done if i want to do the samething for every 8 matrices and store them using different variables.

   for eg data1=[data; data1.dataStruct.data]; (for first8 matrices)
       data2=[data; data1.dataStruct.data]; (for second8 matrices)
       datan=[data; data1.dataStruct.data]; (for last8 matrices)

[Mischa Kim]

See updated answer above.