Easy for loop question
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I'm trying to make a simple For Loop:
for i=1:603
if A(i,2)>((A(i-1,2)+A(i+1,2))/2)*10
A(i,:)=[];
and i'm getting the error:
"Subscript indices must either be real positive integers or logicals."
I don't understand why, since i is an integer.
Thanks
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Evan
il 18 Ago 2014
Modificato: Evan
il 18 Ago 2014
i must be a real, positive integer. Because i starts at 1, and you reference A(i-1,2), your first iteration will try to access A(0,2), and 0 is not a proper matrix index under MATLAB's conventions.
To solve this, either adjust your indexing so that you access A(i+1,:) or change your range to i = 2:603+1
Guillaume
il 18 Ago 2014
As others have said, the issue is from A(i-1,2) that is not valid for i = 1.
There's a second issue that you are deleting rows as you are iterating over them so in all likelyhood, you'll hit an 'index exceeds matrix dimensions' before the end of the loop because you no longer have 603 rows.
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