Save number of iterations in a for loop
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Rajvi Amle
le 13 Juil 2021
Modifié(e) : Scott MacKenzie
le 14 Juil 2021
I have a for loop, but every iteration overwrites the variable and I have only the final data left.. how can I save data from every loop? Following is my code:
n=10;
t=[];
x=[];
for i=1:n
tspan=[0 max(EXP.t)];
MAT=[SYSTEM.m_BW(i) SYSTEM.w_L(i) SYSTEM.w_K(i) SYSTEM.w_Lu(i) SYSTEM.w_BR(i) SYSTEM.w_Blood(i) SYSTEM.w_Plasma(i) SYSTEM.m_L(i) SYSTEM.m_BR(i) SYSTEM.m_K(i) SYSTEM.m_S(i) SYSTEM.m_Lu(i) SYSTEM.m_Blood(i) SYSTEM.m_Plasma(i)...
SYSTEM.V_L(i) SYSTEM.V_BR(i) SYSTEM.V_K(i) SYSTEM.V_S(i) SYSTEM.V_Lu(i) SYSTEM.V_Blood(i) SYSTEM.V_Plasma(i) SYSTEM.F_C(i) SYSTEM.F_L(i) SYSTEM.F_BR(i) SYSTEM.F_K(i) SYSTEM.F_S(i) SYSTEM.F_Res(i) SYSTEM.F_bal(i) SYSTEM.F_Bile(i) SYSTEM.F_Urine(i)...
SYSTEM.V_Res(i) SYSTEM.V_bal(i) SYSTEM.V_L_b(i) SYSTEM.V_L_t(i) SYSTEM.V_BR_b(i) SYSTEM.V_BR_t(i) SYSTEM.V_K_b(i) SYSTEM.V_K_t(i) SYSTEM.V_S_b(i) SYSTEM.V_S_t(i) SYSTEM.V_Lu_b(i) SYSTEM.V_Lu_t(i) SYSTEM.V_Res_b(i) SYSTEM.V_Res_t(i)...
DRUG.m_Au_iv(i) DRUG.M_Au_iv(i)]';
options=odeset('AbsTol',10e-2,'RelTol',10e-2,'Stats','on');
col=zeros(18,1);
[t0,x0]=ode15s(@ode_toy, tspan, col,[],ov,DRUG,MAT);
t=[t, {t0}];
x=[x, {x0}];
end
saves only the last value when i=10. how do I get the other values for (t) and (x)?
Any help would be really appreciated. Thank You in advance.
13 commentaires
Scott MacKenzie
le 14 Juil 2021
@Rajvi Amle Now that we've established that the t and x data are indeed collected in your script, I've posted an answer demonstrating one way to extract the data from the variables and plot the results for the 10 simulations. There might be different or more appropriate ways to aggregate the data or compute summary statistics, but I'll leave this for you to explore. Good luck.
Réponse acceptée
Sulaymon Eshkabilov
le 14 Juil 2021
An easy solution is:
n=10;
for i=1:n
tspan=[0 max(EXP.t)];
MAT=[SYSTEM.m_BW(i) SYSTEM.w_L(i) SYSTEM.w_K(i) SYSTEM.w_Lu(i) SYSTEM.w_BR(i) SYSTEM.w_Blood(i) SYSTEM.w_Plasma(i) SYSTEM.m_L(i) SYSTEM.m_BR(i) SYSTEM.m_K(i) SYSTEM.m_S(i) SYSTEM.m_Lu(i) SYSTEM.m_Blood(i) SYSTEM.m_Plasma(i)...
SYSTEM.V_L(i) SYSTEM.V_BR(i) SYSTEM.V_K(i) SYSTEM.V_S(i) SYSTEM.V_Lu(i) SYSTEM.V_Blood(i) SYSTEM.V_Plasma(i) SYSTEM.F_C(i) SYSTEM.F_L(i) SYSTEM.F_BR(i) SYSTEM.F_K(i) SYSTEM.F_S(i) SYSTEM.F_Res(i) SYSTEM.F_bal(i) SYSTEM.F_Bile(i) SYSTEM.F_Urine(i)...
SYSTEM.V_Res(i) SYSTEM.V_bal(i) SYSTEM.V_L_b(i) SYSTEM.V_L_t(i) SYSTEM.V_BR_b(i) SYSTEM.V_BR_t(i) SYSTEM.V_K_b(i) SYSTEM.V_K_t(i) SYSTEM.V_S_b(i) SYSTEM.V_S_t(i) SYSTEM.V_Lu_b(i) SYSTEM.V_Lu_t(i) SYSTEM.V_Res_b(i) SYSTEM.V_Res_t(i)...
DRUG.m_Au_iv(i) DRUG.M_Au_iv(i)]';
options=odeset('AbsTol',10e-2,'RelTol',10e-2,'Stats','on');
col=zeros(18,1);
[t0,x0]=ode15s(@ode_toy, tspan, col,[],ov,DRUG,MAT);
time{i}=t0;
X{i}=x0;
end
4 commentaires
Scott MacKenzie
le 14 Juil 2021
Modifié(e) : Scott MacKenzie
le 14 Juil 2021
Yes, that's true. But, so too does the original script.
Sulaymon Eshkabilov
le 14 Juil 2021
Just to see all iteration values the collected cell array can be converted into a matrix array after the loop, e.g:
...
XX = cell2mat(X);
Time=cell2mat(time);
Plus de réponses (1)
Scott MacKenzie
le 14 Juil 2021
Modifié(e) : Scott MacKenzie
le 14 Juil 2021
@Rajvi AmleThis script shows one approach to plotting the results of your simulations. The data loaded are the t and x data collected in the script in your question. I've organized the data from each simulation into 3 (6x1) dimensions as you mentioned in a comment. You can explore other aggregations, as appropriate.
% loads the data for 10 simulations into t and x
load('testdata.mat');
% plot simulation results
tiledlayout(2,5);
for i=1:length(t)
% convert data for each iteration to double matrices
tm = cell2mat(t(i)); % 1 column (time steps)
xm = cell2mat(x(i)); % 18 columns (dynamic states)
% aggregate into 3 columns (6 columns for each dimension)
x3 = [mean(xm(:,1:6),2), mean(xm(:,7:12),2), mean(xm(:,13:18),2)];
nexttile;
plot(tm,x3);
title(sprintf('Simulation #%d', i));
legend('Dim 1', 'Dim 2', 'Dim 3');
end
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