MATLAB: Convert matrix from hexadecimal to decimal

MATLABmatricesmatrixmatrix manipulation

I have a large square matrix in hexadecimal notation and i need to transform it to decimal. for instance consider this:
A = [af 2 3; a2 b 9; c d f];
I want the result in the form:
A = [175 2 3;162 11 9; 12 13 15];
Since I have a very large matrix so I am not able to write {'af'} instead of [af] e.t.c.

Best Answer

Hi,
you could use hex2dec - depending on your input format / input data type this will work or not. I think this is why Jan asked in his comment. Consider the following examples:
>> A = ["af", "2", "3"; "a2", "b", "9"; "c", "d", "f"]
A = 
  3×3 string array
    "af"    "2"    "3"
    "a2"    "b"    "9"
    "c"     "d"    "f"
>> A = hex2dec(A)
A =
   175     2     3
   162    11     9
    12    13    15
or:
>> A = {'af', '2', '3'; 'a2', 'b', '9'; 'c', 'd', 'f'}
A =
  3×3 cell array
    {'af'}    {'2'}    {'3'}
    {'a2'}    {'b'}    {'9'}
    {'c' }    {'d'}    {'f'}
>> A = hex2dec(A)
A =
   175
   162
    12
     2
    11
    13
     3
     9
    15
but the following is not really helpul::
>> A = ['af', '2', '3', 'a2', 'b', '9', 'c', 'd', 'f']
A =
    'af23a2b9cdf'
>> whos A
  Name      Size            Bytes  Class    Attributes
  A         1x11               22  char               
>> A = hex2dec(A)
A =
   1.2035e+13
or consider the following, which gives an error message:
>> A = ['af 2 3 a2 b 9 c d f']
  
A =
    'af 2 3 a2 b 9 c d f'
>> whos A
  Name      Size            Bytes  Class    Attributes
  A         1x19               38  char               
>> A = hex2dec(A)
Error using hex2dec>hex2decImpl (line 58)
Input to hex2dec should have just 0-9, a-f, or A-F.
Error in hex2dec (line 21)
        d = hex2decImpl(h);
but the following is working, by using the split function::
>> A = ['af 2 3 a2 b 9 c d f']
A =
    'af 2 3 a2 b 9 c d f'
>> A= split(A," ")
A =
  9×1 cell array
    {'af'}
    {'2' }
    {'3' }
    {'a2'}
    {'b' }
    {'9' }
    {'c' }
    {'d' }
    {'f' }
>> A = hex2dec(A)
A =
   175
     2
     3
   162
    11
     9
    12
    13
    15
This 9x1 result can be reshaped easily:
A = reshape(A,3,3)
to get a 3x3 matrix by using the reshape function.
So you have to think about how you import the data to matlab and then you can easily convert the hexadecimal format to decimal notation. But, as shown, it strongly depends on how your data is formatted.
Best regards
Stephan
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