How to obtain repetition patterns (start, end indices) in an array?
4 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Chaitanya P
am 2 Apr. 2015
Beantwortet: Chaitanya P
am 2 Apr. 2015
Hi,
My question is as follows:
Given an array N (see below) and a key value, I would like to identify the start and end indices of the pattern associated with the key.
N = [1 1 2 2 2 2 3 3 3 4 4 4 4 1 1 1 1 2 2 2 3 3 3 3 3];
key = 2;
For example, in the above, the pattern associated with '2' can be captured by a sequence of start indices and end indices. Thus, I would like the output:
start_indices = [3 18]
end_indices = [6 20]
How can I do this in MATLAB? Any help appreciated. Thanks in advance!
PS. The broader pattern in this problem is always cyclical. For example, a sequence of 1's is always followed by sequence of 2's, followed by sequence of 3's, followed by sequence of 4's and then back to a sequence of 1's.
0 Kommentare
Akzeptierte Antwort
Weitere Antworten (1)
Philipp Maier
am 2 Apr. 2015
Bearbeitet: Philipp Maier
am 2 Apr. 2015
Please feel free to simplify the following:
flag = 1;
start_indices = [];
end_indices = [];
for i=1:numel(N)
if ((N(i)==key) && flag == 1)
start_indices = [start_indices i];
flag = 0;
elseif (flag == 0 && (N(i)~=key) )
end_indices = [end_indices i-1];
flag = 1;
end
end
0 Kommentare
Siehe auch
Kategorien
Mehr zu Logical finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!