Subscripted dimension mismatch error dec2hex

Hello

I searched regarding this error but still could not resolve it. I am using the following code:

    function[hexoutput] = hexaoutput(colordata)
    [row col] = size(colordata);
    hexoutput=zeros(row,col);
      for i=1:row
         for j=1:col
        hexoutput(i,j) = dec2hex(colordata(i,j),6);
     end
    end
    end

I am getting the subscripted dim mismatch error. But this is how we loop through a matrix. I am confused. Any help would be great. Thanks.

Answer 1

[Walter Roberson]

dec2hex(SOMETHING,6) is going to return 6 (or more) characters. You then try to store those 6 characters into a single numeric array location. Remember, hex is represented as character, but zeros() is numeric, so you are using the wrong datatype for your output array and you are not allowing for the fact that each output needs multiple characters.

[Panda]

aha....I get it...what is the way around this then sir? If I want a matrix to be converted to hex values then what changes should I do in my code? The matrix is 122X400...I know its quite large. Could you help here then...? Thanks!

EDIT: ok, I managed to do it. I declared hexoutput as a cell array and then did the same thing. It worked. My another question is - Can't we represent hex in 0X** format?

[Walter Roberson]

Consider using sprintf('0x%06x', colordata(i,j))

[Panda]

Brother you are simply great!! :) :D Thank you so much!

Answer 2

[Roger Stafford]

The dec2hex(colordata(i,j),6) quantity is a string of at least six hex characters, and yet your are attempting to place it in a single element of hexoutput. It won't fit. You'll have to make hexoutput bigger! Maybe you'd like to make it three-dimensional.

[Panda]

Same ans as above sir...understood my mistake. Thanks