Cannot open file , no permission

 letters={'a'; 'b'; 'c'; 'd'; 'e'; 'f'; 'g'; 'h'; 'i'; 'j'; 'k'; 'l'; 'm'; 'n'; 'o' ;'p'; 'q'; 'r'; 's'; 't' ; 'u' ;'v' ;'w';  'x' ;'y'; 'z'; 'aa'; 'bb'; 'cc'; 'dd'; 'ee'; 'ff'; 'gg'; 'hh'; 'ii'; 'jj'; 'kk'; 'll'; 'mm'; 'nn'; 'oo'; 'pp'; 'qq'; 'rr'; 'ss'; 'tt'; 'uu'; 'vv'; 'ww'; 'xx'; 'yy'; 'zz'; 'num0'; 'num1'; 'num2'; 'num3'; 'num4'; 'num5'; 'num6'; 'num7'; 'num8'; 'num9'};

 increment =1;

 for y = 1: 62

    for k = 1 : 10

        test = strcat(letters(y,:) , num2str(k));

        imageName = imread('training_set',test,'.png');

        imageName = rgb2gray(imageName);

        x(:, increment) = (feature_extract(~im2bw(imageName)));

        increment = increment + 1;

    end;

 end;

 x = x';

Error using imread (line 347) Cannot open file "training_set" for reading. You might not have read permission.

Error in myFeatureScript (line 6) imageName = imread('training_set',test,'.png');

Please Help !!

Answer 1

[chandrapal Singh]

a=strcat('Your_Path\','Image.extenstion');

imageName =imread(a);

Answer 2

[Walter Roberson]

          imageName = imread(['training_set',test,'.png']);