group equal value in array

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Hi,

I have one 1x2048 array with repeated values:

A = [0 0 0 255 255 255 0 0 0 0 0 255 255 255 255 255 0 0 0 0]

and I would like to group similar element so that the output would be this:

B = [0 255 0 255 0]

I need to retain the altenation of the values because at the end of this I need to count how many 255 and 0 are there.

Any help would be much apreciated

Thanks

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Answer 1

the cyclist 2019-10-4

编辑：the cyclist 2019-10-4

0 个投票

If you get the RunLength utility from the File Exchange, it will give you the output vector you want and the counts, in one function call.

>> [B N] = RunLength(A)
B =
     0   255     0   255     0
N =
     3     3     5     5     4