Simple Question (I think) about finding zeros(and other number) in an array

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Manne Plok
Manne Plok 2018-9-7
评论： madhan ravi 2018-9-7
I have the following array.
R = [ 1 2 0 1 0 2]
if values in R = 0 I want to replace it with 3, so I did
If R == 0
R = 3
end
So it should end up
R = [ 1 2 3 1 3 2]
However as you probably know, this does not work. How do I make this work? Thanks! Same problem with the following:
P = [ 1 2 3 4 5]
Q = [ 5 4 3 2 5]
I want to find positions where P == Q so I tried
if P == Q
Q = 6
end
ie all positions where P = Q change to 6 so it should end up with
Q = [ 5 4 6 2 6]

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采纳的回答

madhan ravi
madhan ravi 2018-9-7
编辑：madhan ravi 2018-9-7
TRY THIS:
R = [ 1 2 0 1 0 2]
R(R==0)=3
P = [ 1 2 3 4 5]
Q = [ 5 4 3 2 5]
Q(Q==P)=6
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madhan ravi
madhan ravi 2018-9-7
编辑：madhan ravi 2018-9-7
C = [ 3 4 5 6 7 8]
R = [ 1 2 0 1 0 2]
D = [ 8 7 6 5 4 3]
D(R==0)=1
C(R==0)=C(R==0)-1
R(R==0)=3
Without loop

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