Error when manipulating values on a matrix

2013 1 2
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Hello there,
I've got a few problems with my code. I'm going to explain: I have a matrix that is randomly generated: Populacao1 = [((randi([-1 1], n_individuos, n_centrais*int_tempo)))];
n_individuos=10 (or another number) n_centrais=2 (or more) and int_tempo = 10 (or more)
Populacao1 has only 1, -1 and 0 values. Now the problem begins.
I want to be able to keep 4 matrix (caulda_turbinado_c1, caudal_bombado_c1 and caulda_turbinado_c2, caudal_bombado_c2)
caudal_turbinado_c1 is the first (n_centrais*int_tempo)/2 where the the value equals 1 and caudal_bombado_c2 is when it equals -1. caudal_turbinado_c2 and bombado_c2 are the same in the other half of the matrix. the problem is that it doesn't work. Don't know why :s
for i=1:n_individuos
for j=1:int_tempo*n_centrais
if j <= int_tempo
if(Populacao1(i,j)==1)
caudal_turbinado_c1(i,j) = 100;
if(Populacao1(i,j)==-1)
caudal_bombado_c1(i,j)=200;
end
end
end
if j > int_tempo && j<=int_tempo*n_centrais
if(Populacao1(i,j)==1)
caudal_turbinado_c2(i,j-int_tempo) = 400;
if(Populacao1(i,j)==-1)
caudal_bombado_c2(i,j-int_tempo)=200;
end
end
end
end
end
Thanks in advance

4 个评论
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Azzi Abdelmalek
Azzi Abdelmalek 2013-1-2
If you provide data to test your code, it will be helpful
Jan
Jan 2013-1-2
Pleas explain "it doesn't work" with any details. Do you get an error message or do the results differ from your expectations?
André Pacheco
André Pacheco 2013-1-3
The result is different from my expectations. I was expecting that my could would divide the matrix into to halfs, and in the first one it would put 100 if =1 and 200 if the value =-1 and in the second half it would put 400 if value =1 and 200 if value =-1. If the value was 0 it would do nothing. The thing is that it doesnt work. Don't know why. I resolve this spliting the matrix, do the process and then merge the matrix back together. But it would be much better if this work.
André Pacheco
André Pacheco 2013-1-3
Azzi i think i've put all the values in the explanation. What is missing? thanks for the help!

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 采纳的回答

per isakson
per isakson 2013-1-4
编辑：per isakson 2013-1-4

0 个投票

The statement
caudal_bombado_c1(ii,jj)=200;
in
if (Populacao1(ii,jj)==1)
caudal_turbinado_c1(ii,jj) = 100;
if(Populacao1(ii,jj)==-1)
caudal_bombado_c1(ii,jj)=200;
end
end
will never be executed, since
Populacao1(ii,jj)
cannot be identical to +1 and -1 at the same time.
.
Modified code - I'm just guessing
You should do some exercises with the debugging features in Matlab. Put some break-points in the code and run
>> [ ctc1, cbc1, ctc2, cbc2 ] = cssm();
where
function [ ctc1, cbc1, ctc2, cbc2 ] = cssm()
n_individuos = 10;
int_tempo = 6;
n_centrais = 2;
Populacao1 = randi( [ -1, 1 ], n_individuos, int_tempo * n_centrais );
[ ctc1, cbc1, ctc2, cbc2 ] ...
= cssm_( n_individuos, int_tempo, n_centrais, Populacao1 );
end
function varargout = cssm_( n_individuos, int_tempo, n_centrais, Populacao1 )
caudal_turbinado_c1 = nan( n_individuos, int_tempo*n_centrais );
caudal_bombado_c1 = nan( n_individuos, int_tempo*n_centrais );
caudal_turbinado_c2 = nan( n_individuos, int_tempo*n_centrais );
caudal_bombado_c2 = nan( n_individuos, int_tempo*n_centrais );
for ii=1:n_individuos
for jj=1:int_tempo*n_centrais
if jj <= int_tempo
if (Populacao1(ii,jj)==1)
caudal_turbinado_c1(ii,jj) = 100;
elseif(Populacao1(ii,jj)==-1)
caudal_bombado_c1(ii,jj)=200;
else
% do nothing
end
end
if jj > int_tempo && jj<= int_tempo * n_centrais
if(Populacao1(ii,jj)==1)
caudal_turbinado_c2(ii,jj-int_tempo) = 400;
elseif(Populacao1(ii,jj)==-1)
caudal_bombado_c2(ii,jj-int_tempo)=200;
else
% do nothing
end
end
end
end
varargout = { caudal_turbinado_c1, caudal_bombado_c1 ...
, caudal_turbinado_c2, caudal_bombado_c2 };
end

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