MATLAB: Decimal array from logical array

logical array clever fast

Hi,
I need to convert a logical array into a decimal array, but the logical elements need to be grouped in pairs. An example would make this clearer:
I have a logical array such as:
>> a = logical([1,0,1,1,1,0; 1,1,0,0,0,1; 0,1,1,1,0,1])
a =
     1     0     1     1     1     0
     1     1     0     0     0     1
     0     1     1     1     0     1
and I want to convert that to decimal with each 2 bits being 1 number:
b =
     2 3 2
     3 0 1
     1 3 1
Does anyone know a clever/ fast MATLAB way of doing this, rather than the boring/slow for-loop way?

Best Answer

2*a(:, 1:2:end) + a(:, 2:2:end)
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