MATLAB: Sum separate continuous values

add separate continuous values

Hello Matlab Senior Users
I have a column of data 0 and 1 and the example data is like this format. There are 2 number of continous 1 value group. I don't want all groups of 1 values. I need only the number of continuous 1 value groups. It is 2 for this sample data (index 3 to 4 and index 6 to 8).
0
0
1
1
0
1
1
1
0
1
0
1
0
0
I tried some code like this suggested by some expert. But the answer is not correct. 
ids=find(x==1);
choice=diff(ids)~=1;
ids([true;choice])
indexes=ids([true;choice]);
groups=numel(indexes)
If someone kindly advice me in for loop or while loop if will helpful for me.
Thank you very much for your helps.

Best Answer

%%

d   = diff( c );
ixb = find( d == +1 ) + 1;
ixe = find( d == -1 );
%%
is_group = ixe >= ixb + 1;
[ ixb(is_group), ixe(is_group) ]
outputs
ans =
     3     4
     6     8
>>
where
  • c is the column of your question
  • the first column of ans are indicies of the first "one" in a group and the second column the last.
Test this script with other input columns.
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