This code says 'Index exceeds matrix dimensions' error help!

function braille = convertToBraille(letter)

global brailleTable

global x

x = [];

braille = double(letter);

for i = 1: length(letter)

if braille(i) == 97

          x = brailleTable(1:3,1:2);  %LINE 10

      elseif  braille(i) == 98
          x= brailleTable(1:3,3:4);
      elseif braille(i) == 99
          x = brailleTable(1:3,4:6);
      elseif braille(i) == 100
          x = brailleTable(1:3,5:8);
  end
   braille(i) = x;
  end

I am trying to create converting alphabet to braille code.

it says Index exceeds matrix dimensions. at line 10

Answer 1

[Walter Roberson]

You did not initialize brailleTable in the global workspace before you called the function. A global variable that has not been initialized after being declared global, will have value []

http://www.mathworks.com/help/matlab/math/parameterizing-functions.html