global variable in for loop
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi,
I have a for loop, which has last iterative defined as the size of some matrix K, i.e.
[a,b]=size(K)
for i=1:a
CODE
end
Trouble is, the "CODE" in the for loop redefines how large K is - in particular, it decreases a. This means that the for loop experiences an "Index exceeds matrix dimensions." error. How does one go about fixing this? I thought that in the for loop I could have:
a=a-1;
everytime the "CODE" decreases the size of K, but it don't work none!
Thanks,
Linford
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 18 Jan. 2012
If you are deleting the entry you are examining under some circumstances, then the easiest change is often to run the loop backwards .
0 Kommentare
Weitere Antworten (1)
Jan
am 18 Jan. 2012
The argument of the FOR loop is calculated once and is not influenced by the contents of the loop - in opposite to C.
You can check the exceeding index explicitely:
[a,b] = size(K);
for i = 1:a
if i > size(K, 1)
break;
end
CODE
end
Using a WHILE loop is a nice alternative:
[a,b] = size(K);
while i <= size(K, 1)
CODE
i = i + 1;
end
0 Kommentare
Siehe auch
Kategorien
Mehr zu Loops and Conditional Statements 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!