Avoiding for loop and if
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I'd like to avoid the following "for loop". Is it possible?
In the following code, the matrix CAR_GEN is the input. This matrix has rows number=1000, and column number=4. In the first column of this matrix there are two possibilities: or 'G' or 'C', and if I have 'C' i have to do the operation under the if-test and finally find the vector ''Scarto''.
Is it possible to check directly if the element of the first column is 'C' and then do the operation in order to find 'Scarto', in order to save time?
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Scarto = zeros (N_nodi_tot - N_nodi_gen,1); %Array initialization
for Riga = 1:100000
if CAR_GEN(Riga,1) == abs('C')
Ncar = CAR_GEN(Riga,2);
Pcar = CAR_GEN(Riga,3)/Nbase;
Qcar = CAR_GEN(Riga,4)/Nbase;
Nload = Ntot(Riga,1);
Scarto(Ncar,1) = Nload - (Pcar + 1i*Qcar);
end
end
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Thanks!
3 个评论
Walter Roberson
2020-5-19
logical indexing
Giovanni Gardan
2020-5-19
Walter Roberson
2020-5-19
Looks plausible.
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此问题已关闭。
2020-5-19
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2021-8-20
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