Why is the If Statement Not Working?

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Scott Banks
Scott Banks 2023-8-23
移动：Voss 2023-8-23
Hi guys,
I am trying to create a simple If Statement within a for loop, but I am not getting the correct results.
I am running a loop 6 times, and for i = 1 and i = 4 I want a different computation. Here is the code
Kc = [1 0 0 -1 0 0
0 12 6*L 0 -12 6*L
0 6*L 4*L^2 0 -6*L 2*L^2
-1 0 0 1 0 0
0 -12 -6*L 0 12 -6*L
0 6*L 2*L^2 0 -6*L 4*L^2]
for i = 1:6
if i 1 | 4
Kc(i,:) = Kc(i,:)*(E*A)/L
else
Kc(i,:) = Kc(i,:)*(E*I)/L^3
end
end
The above code does everything for
Kc(i,:) = Kc(i,:)*(E*A)/L
and not i = 2,3,5,6 for
Kc(i,:) = Kc(i,:)*(E*I)/L^3
Can someone explain and help please?
Many Thanks.

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采纳的回答

Stephen23
Stephen23 2023-8-23
编辑：Stephen23 2023-8-23
This code
if i 1 | 4
is exactly equivalent to writing
if i
1 | 4
where the second line is calculated and the result immediately discarded, i.e. it does nothing useful at all.
You probably intended this:
if i==1 || i==4
or this:
if any(i==[1,4])
or this:
if ismember(i,[1,4])

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