series of consecutive numbers in a matrix

hi everyone,

i need to make a vec who has the num of the rows of the series of consecutive numbers.

how can i write a program to find where those consecutive numbers are? i've tried using a for loop but haven't really got anywhere

for eg

if this is my matrix :

numMat= [2 3 5; 6 1 3; 4 5 6; 3 3 3; 9 8 7; 1 2  3];

the vec will be :

indVec= [3,6]

my scrips is:

numMat= [2 3 5; 6 1 3; 4 5 6; 3 3 3; 9 8 7; 1 2 3];
indVec=[];
count=1;
for i= 1: size(numMat,1)
    for j= 1: size (numMat,2)
        if numMat(i,j)== numMat(i,j+1)
             indVec (count)= i;
             count= count+1;
        end
     end
end

[Stephen23]

@noa goldman: it is not appreciated when you delete your question like that. Now the answers have no context and are meaningless to anyone else. You unilaterally decided that our volunteers efforts should only be useful to you, which is very unfair for us.

[Anusha Sridharan]

[Answers Dev] Restored edits

Answer 1

[Stephen23]

This is MATLAB, so get rid of the pointless loops:

>> M = [2 3 5; 6 1 3; 4 5 6; 3 3 3; 9 8 7; 1 2 3]
M =
   2   3   5
   6   1   3
   4   5   6
   3   3   3
   9   8   7
   1   2   3
>> X = find(all(diff(M,1,2)==1,2))
X =
   3
   6