How to convert 0's and 1's to intergers

For example i have an array of ones and zeros, 100 total.(00000,1111111111,0000000000000,11111...). How can i count them, and return integers for example (0,1,2,4,3,1,..)

[Thomas]

what logic do you use to convert (00000,1111111111,0000000000000,11111...) to (0,1,2,4,3,1,..)?

[Geoff]

I'm baffled too. You describe two different things (conversion from binary, and counting), then give an example that shows neither.

[kimiri]

I had a for loop in mind to count from 1:100. For the first set of zeros, count them and assign an integer zero. For the next set of ones, count them and assign them an integer value 1 and so on...

[Walter Roberson]

What do you want done with the counts then?

You have 100 total entries, right? But you want to find the lengths of sequences of consecutive 0's and 1's? There wouldn't necessarily be 100 such sequences, so using a for loop from 1:100 would not seem appropriate.

[kimiri]

Sorry for the confusion guys. This data is coming from a laser sensor and every 0 and 1 counts to a total of 100. All i am trying to do is replace(not convert) each sequence with a numerical value and end up with a short array.

[per isakson]

What type of array is (000,111...). Are those ascii-characters? Double?

[Geoff]

Uhhhh, do you mean you have a single stream, not a partitioned list as you described: 000001111111111000000000000011111...

And you want to mark off each low-high and high-low transition, count the values in between, and put that count into an array representing all groups?

For this data that would mean: [5,10,13,5,...]

With indices that are implicit due to the array order (and you could always subtract 1 from the 1-based index.

[Richard Brown]

Can you post a concrete example of what the sequences look like and the corresponding integers that you'd want?

[kimiri]

Geoff, thats exactly what i mean. Thanks

[Geoff]

In the words of Hoggle from The Labyrinth.... "Well, why didn't you SAY SO?" =)

Answer 1

[per isakson]

If that happens to be a string of characters, try:

cac = regexp( '000001111111111000000000000011111', '(0+)|(1+)', 'match' );
cellfun( @(s) numel(s), cac )

You have to check whether it starts with "1" or "0"

[Geoff]

Heheh that's exactly what I would have suggested too... Except the match string can just be '(0+|1+)'.

[Geoff]

Oh, and there's no need to make an anonymous function if you're just pumping a single input through:

cellfun( @numel, cac )

[kimiri]

Appreciate it guys, i just happen to be new to this world of coding, thanks

[per isakson]

I'll remember that. Thanks!