Find all occuarances of two numbers together
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Inna Pelloso
am 26 Okt. 2020
Kommentiert: Image Analyst
am 26 Okt. 2020
Hi,
I have an array, a = [ 0 -1 1 0 0 -1 1 0]
How can I fing all the ocurances of [ 1 0], ie. the index showing when the number 0 occurs after the number 1.
I want to create, b = [0 0 0 1 0 0 0 0 1].
I'm trying to use teh strfind fuction, but am stuck.
Thank you!
Inna
0 Kommentare
Akzeptierte Antwort
Ameer Hamza
am 26 Okt. 2020
Try this
a = [ 0 -1 1 0 0 -1 1 0];
idx = strfind(a, [1 0])+1;
b = zeros(size(a));
b(idx) = 1;
1 Kommentar
Weitere Antworten (1)
Mathieu NOE
am 26 Okt. 2020
hello Inna
you have to test a vs [1 0] and not [0 1]
this is the code :
a = [ 0 -1 1 0 0 -1 1 0];
t = [1 0];
ind = findstr(a,t);
ind_zero = ind+1; % findstr output index is for the first term of "t" (1) => to get the index of the trailing "0" you need to add 1
b = zeros(size(a));
b(ind_zero) = 1
2 Kommentare
Bruno Luong
am 26 Okt. 2020
Bearbeitet: Bruno Luong
am 26 Okt. 2020
Attention, better use strfind and not findstr, if a = 1
>> findstr(1,[0 1]) % not expected result
ans =
2
>> strfind(1,[0 1])
ans =
[]
Siehe auch
Kategorien
Mehr zu Characters and Strings finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!