Search code examples
matlabmatrixbinarybinary-matrixbinary-image

Element-wise binary value concatenation of two matrices

Element by element, I want to concatenate binary values from different matrices to one matrix.

For example,

|1 0 0|  |0 1 0|   |10 01 00|         
|0 1 1|  |1 1 0| = |01 11 10|       
|1 0 1|  |0 0 1|   |10 00 11|

How can this be done?

Solution

  • Here is one alternative without bin2dec or dec2bin conversion

    out = arrayfun(@(x,y) strcat(num2str(x),num2str(y)),A1,A2,'Uni',0);

    Input:

    A1 = [1 0 0; 0 1 1; 1 0 1];
A2 = [0 1 0; 1 1 0; 0 0 1];

    output:

    >> out

out = 

'10'    '01'    '00'
'01'    '11'    '10'
'10'    '00'    '11'

    If you want it as numeric instead of string, you might do this:

    outp = cellfun(@(x) str2double(x), out);

    output:

    >> outp

outp =

10     1     0
 1    11    10
10     0    11