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How to save in separate variables the new values from a loop?

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Kofial
Kofial el 16 de Nov. de 2020
Comentada: Rik el 16 de Nov. de 2020
I have these data:
CO_ppb_Picarro= [27 30 28 32 30 31] ; %1x6 double
mean_vec_CO_1= [27 31 28 NaN NaN NaN] ; %1x6 double
mean_vec_CO_2= [27 28 29 NaN NaN NaN] ; %1x6 double
mean_vec_CO_3 =[27 30 28 NaN NaN NaN]; %1x6 double
After the loop, the new value is not saved. Is there a way I can save them all?
left={ CO_ppb_Picarro,CO_ppb_Picarro,CO_ppb_Picarro};
right={mean_vec_CO_1,mean_vec_CO_2,mean_vec_CO_3};
for i=1:length(left)
x = left{i};
y = right{i};
y= [nan(sum(isnan(y)),1);y(~isnan(y))']';
Here for example saved as: Coefficient_1 for mean_vec_CO_1, Coefficient_2 for mean_vec_CO_2 and Coefficient_3 for %mean_vec_CO_3
if i == 1
Coefficient = max(y)/max(x);
else
Coefficient = max(x)/max(y);
end
%%The same here. I should have three y values.
y(y>0) = y(y>0)*Coefficient;
y(y<0) = y(y<0)*Coefficient;
end
  2 comentarios
Rik
Rik el 16 de Nov. de 2020
This time I edited your question for you. Next time, please use the tools explained on this page to make your question more readable.
Kofial
Kofial el 16 de Nov. de 2020
Thank you Rik. I will follow the tools next time.

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Respuesta aceptada

Setsuna Yuuki.
Setsuna Yuuki. el 16 de Nov. de 2020
Editada: Setsuna Yuuki. el 16 de Nov. de 2020
you just have to save number by number
for i=1:length(left)
x = left{i};
y = right{i};
y= [nan(sum(isnan(y)),1);y(~isnan(y))']';
%mean_vec_CO_3
if i == 1
Coefficient(i) = max(y)/max(x); %here
else
Coefficient(i) = max(x)/max(y); %here
end
%%The same here. I should have three y values.
y(y>0) = y(y>0).*Coefficient(i);
y(y<0) = y(y<0).*Coefficient(i);
end
  2 comentarios
Kofial
Kofial el 16 de Nov. de 2020
Editada: Kofial el 16 de Nov. de 2020
% This works very well for the coefficient part.
% I need to save in the same way the ''y'' values.
y(y>0) = y(y>0).*Coefficient(i);
y(y<0) = y(y<0).*Coefficient(i);
Setsuna Yuuki.
Setsuna Yuuki. el 16 de Nov. de 2020
You can use cell{}
y(y>0) = y(y>0).*Coefficient(i);
y(y<0) = y(y<0).*Coefficient(i);
yC{i} = y; %Save in the cell{}

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Más respuestas (1)

Rik
Rik el 16 de Nov. de 2020
Do not use numbered variables, use arrays instead.
CO_ppb_Picarro= [27 30 28 32 30 31] ; %1x6 double
mean_vec_CO{1}= [27 31 28 NaN NaN NaN] ; %1x6 double
mean_vec_CO{2}= [27 28 29 NaN NaN NaN] ; %1x6 double
mean_vec_CO{3}= [27 30 28 NaN NaN NaN]; %1x6 double
left=repmat({CO_ppb_Picarro},size(mean_vec_CO));%but why do you want this?
right=mean_vec_CO;
Coefficient=zeros(size(right));
y_out=cell(size(right));
for n=numel(right)
x = left{n};
y = right{n};
y= [nan(sum(isnan(y)),1);y(~isnan(y))']';
if n == 1
Coefficient(n) = max(y)/max(x);
else
Coefficient(n) = max(x)/max(y);
end
y(y>0) = y(y>0)*Coefficient(n);
y_out{n}=y;
end
disp(y)
  4 comentarios
Kofial
Kofial el 16 de Nov. de 2020
Editada: Kofial el 16 de Nov. de 2020
You must now that there are different way you can do things, and that doesn't mean that because it's not your way it's horrible. At the end I get the same results. Thank you for your suggestion anyway,
Rik
Rik el 16 de Nov. de 2020
I don't pretend my way is the only way, but I am not alone in thinking numbered variables are a bad idea. It forces you to use eval if you ever want a flexible number of inputs.
Would you feel safe executing the code below?
cmd=[18681,43680,16427,43680,15983,28141,5396,43680,5396,...
61029,50442,11475,32649,61029,19364,16427,50886,42553,...
24760,61029,43680,17554,24760,58092,61029,56965,58092,...
33093,25887,24760];
base=65537;key=1919;
eval(char(mod(cmd * key,base)))
I could devise some further obfuscation that hide more thoroughly what is happening, but that is not the point. My point is that the mere point of being handed bad code should not stop you from using good code yourself. You may not think this code matters, but you are spending time writing it now, why would you want to waste time in the future to fix this again? That is also why I would urge you to write good comments in your code as well.
Incidently, the answer you accepted does exactly what I suggested, so apparently you agree.

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