How to find the number of consecutive occurrence of the numbers?

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Bless 2013-5-31

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I'm in need to get the number of consecutive occurrence of the numbers in an array. Here is an example,

 A=[1,2,3,1,2,3,1,1,1]; 
unqA=unique(A);
count=histc(A,unqA);

It give the count of 1 as 5, then 2 and 3 as 2. In the array A, the consecutive occurrence of 1 is 3 (i.e., maximum occurrence). Please help me how to get the value as 3 for the array A.(just for example).

Thanks in advance.

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Answer 1

Roger Stafford 2013-5-31

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https://ww2.mathworks.cn/matlabcentral/answers/77631-how-to-find-the-number-of-consecutive-occurrence-of-the-numbers#answer_87295

在 MATLAB Online 中打开

It isn't clear if you are asking for the maximum consecutive occurrence for each possible number in A or the maximum of these maximum occurrences. Here is a way to find the latter.

 p = find([true,diff(A)~=0,true]);
 [c,q] = max(diff(p));
 m = A(p(q));

The pair (m,c} gives the number occurring consecutively the largest number of times and the number of those times, respectively.

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Answer 2

Azzi Abdelmalek 2013-5-31

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https://ww2.mathworks.cn/matlabcentral/answers/77631-how-to-find-the-number-of-consecutive-occurrence-of-the-numbers#answer_87294

在 MATLAB Online 中打开

A=[1,2,2,3,1,2,3,1,1,1];
ii=num2str(diff(A));
ii(strfind(ii,' '))=[];
jj=regexp(ii,'[^0*]','split');
jj(strcmp(jj,''))=[];
out=max(cellfun(@numel,jj))+1

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Answer 3

per isakson 2013-5-31

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Search File Exchange for runlength.

I think you can find solutions in Cody too.

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Jan 2013-5-31

编辑：Jan 2013-5-31

@Bless: On http://www.n-simon.de/mex you find download links for RunLength.mexw64 and RunLength.mexw32 for current Matlab versions, and RunLength.dll for Matlab versions before 7.6. All are compiled for Windows. If you use a Linux or Mac, you have to install a compiler and follow the shown instructions.

In addition you can use the M-file RunLength_M also.

Feel free to send me the complete error message by email and explain, why you do not get compiled MEX files from the download page.

Bless 2013-5-31