How to insert a new vector to matrix in every iteration?
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skinny pete
il 18 Mag 2019
Commentato: Sulaymon Eshkabilov
il 18 Mag 2019
Hi everyone,
I try to form a matrix that gets the vector elements by using for loop. In other words, I want to save the for loop result in a matrix. You can see my code below and what I want.
for x=1:1:3
for y=4:1:5
z = [x y]'
????
end
end
out =
1 1 2 2 3 3
4 5 4 5 4 5
Could you help me about this 2x6 matrix, please?
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madhan ravi
il 18 Mag 2019
Modificato: madhan ravi
il 18 Mag 2019
Trivially done without a loop:
out = [repelem(x,1:numel(x));repmat(y,1,numel(x))]
With loop:
x=1:3;
y=4:5;
ctr=1;
out=zeros(2,numel(x)+numel(y)); % preallocate!
for k=1:numel(x)
for l=1:numel(y)
out(:,ctr) = [x(k) ; y(l)];
ctr=ctr+1;
end
end
Gives:
>> out
out =
1 1 2 2 3 3
4 5 4 5 4 5
3 Commenti
madhan ravi
il 18 Mag 2019
No I don’t and I don’t see how that’s related to the question you originally asked. You'd be better off posting a new question.
Più risposte (1)
Sulaymon Eshkabilov
il 18 Mag 2019
Modificato: Sulaymon Eshkabilov
il 18 Mag 2019
This one works:
x = [1 1 2 2 3 3];
y= [4 5 4 5 4 5];
z = zeros(2, numel(x));
for ii=1:numel(x)
z(:,ii)=[x(ii), y(ii)];
end
4 Commenti
madhan ravi
il 18 Mag 2019
Modificato: madhan ravi
il 18 Mag 2019
I just pointed out the fault which was there and there is no need to get angry with the fact being exposed. If it’s hard just ignore else try to accept the mistake and change it.
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