MATLAB: ??? Subscript indices must either be real positive integers or logicals.

errorxlswrite

I got problem with my code anybody can help..went i run the error is ??? Subscript indices must either be real positive integers or logicals.
Error in ==> forloop at 12 M=mean(H); % mean
 filename='trainingData.xls';
 srcFiles = dir('D:\MASTER\MATLAB\dataset\training\text\*.jpg');  % the folder in which ur  images exists
 for ii = 1 : length(srcFiles)
    filenames = strcat('D:\MASTER\MATLAB\dataset\training\text\',srcFiles(ii).name);
    I = imread(filenames);
    im=imresize(I, [300,300]);
    H=hog_feature_vector(im);
    % add more statistical functions
    M=mean(H); % mean
    S=std(H); % standard deviation
    E=norm(H,2)^2; % the energy
    En=entropy(H); % entropy
    C=corrcoef(H); % correlation
    Img=filenames; mn=M; sd=S; engy=E; ent=En; corr=C;
    fileExist=exist(filename,'file');
    if fileExist == 0
        header ={'Image','Mean','Std','Energy','Entropy','Correlation'};
        xlswrite(filename,header);
    else
        [~,~,input]=xlsread(filename);
        new_data={img,mn,sd,engy,ent,corr};
        output=cat(1,input,new_data);
        xlswrite(filename,output);
    end
    end

Best Answer

I think it's pretty well explained in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_fix_the_error_.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22.3F, don't you?
In your case, you almost certainly have an array called mean(). You're intending to use the function mean, but you blew it away by creating an array called mean and it's thinking H is supposed to be the index(es) of that array, which of course it's not. Try this
which -all mean
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