Detect consecutive positive numbers in an array

Hello,

Let us assum an Array A as follows:

A = [4 9 6 0 0 3 4 0 3]

I want to detect the location (begining and ending) of consecutive positive values and store in a Matrix like B:

B=[1 3
   6 7
   9 9]

For example, in Array A, the first block of consequtive positive values starts from the first element and ends at the third elements.

Would you please help me?

Best, Amir

Answer 1

[David Hill]

A(A<0)=0;%if negative numbers possible
A(A>9)=9;%if >single digit possible
a=num2str(A);
a=a(a~=' ');
B=[regexp(a,'[1-9]*')',regexp(a,'[1-9]*','end')'];

[Amirhossein Moosavi]

Thanks, but it is not generalizable. For example, it does not work for the below array:

A = [4 9 6 0 0 3 4 0 10 0 15 0 0 11 14 0 1]

[David Hill]

Works for me.

[Amirhossein Moosavi]

It works now, thanks.