how to store values in matrix from for loop?
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In my code I want to find all the weight, Return and Risk for my portfolio but for loop give me only last result and 'disp()' function is not enough for all the result Here is my code
z = 100;
percent_change = 1;
n = (z/percent_change)+1;
a = (0:percent_change:z);
b = (0:percent_change:z);
c = (0:percent_change:z);
d = (0:percent_change:z);
for i = 1:(z/percent_change)+1
for j = 1:(z/percent_change)+1
for k = 1:(z/percent_change)+1
for l = 1:(z/percent_change)+1
if a(i)+b(j)+c(k)+d(l) == z
p = Portfolio('assetmean', m, 'assetcovar', C, 'lowerbudget', 1, 'upperbudget', 1, 'lowerbound', zeros(size(m)));
p = setDefaultConstraints(p);
pwgt = [a(i); b(j); c(k);d(l)];
[prsk,pret] = estimatePortMoments(p, pwgt);
disp(pwgt);
disp([prsk,pret]);
end
end
end
end
end
Actually I want all the possible portfolio to create frontier ( not just half of it) I'm just started to use matlab for a few months so any tips would really help me. Thankyou
采纳的回答
dpb
2016-11-14
Simply subscript (preallocate to save reallocation dynamically) the desired output variables...
...
ix=0; % index for cases
for i = 1:n
for j = 1:n
for k = 1:n
for l = 1:n
if a(i)+b(j)+c(k)+d(l) == z
ix=ix+1; % increment the counter
p = Portfolio('assetmean', m, 'assetcovar', C, ...
'lowerbudget', 1, 'upperbudget', 1, ...
'lowerbound', zeros(size(m)));
p = setDefaultConstraints(p);
pwgt{ix} = [a(i); b(j); c(k);d(l)];
[prsk{ix},pret{ix}] = estimatePortMoments(p, pwgt);
...
I don't know anything about what the Financial Toolbox function actually returns but appears to be combination of vectors/arrays possible; hence the outputs are cell arrays containing those elements...
Wonder if there aren't builtin methods to acquire the desired results from the portfolio object itself, though????
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