I want to use a for loop inside a function, where the for loop contains a subfuction. Each loop must store the variable value and make a matrix of all values, but I get 0s :(
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Nikolas Katsantonis
am 17 Jun. 2022
Kommentiert: Nikolas Katsantonis
am 18 Jun. 2022
function [a] = Main(Coordinates)
a=5;
for n=1:a
Coordinates=3+n;
a= test(n,Coordinates)
end
end
function [A, B]= test(n,Coordinates)
A(n)= Coordinates*3;
B(n)= A(n)*Coordinates*6;
end
3 Kommentare
Geoff Hayes
am 17 Jun. 2022
That makes sense, right? Look at this code
function [A, B]= test(n,Coordinates)
A(n)= Coordinates*3;
B(n)= A(n)*Coordinates*6;
end
You are creating a new A and B whenever the test function is called. These new variables/arrays won't have the history from previous calls to this function. So you are always returning arrays of zeros except for the nth value which is set in this function call.
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Geoff Hayes
am 17 Jun. 2022
a=5;
for n=1:a %<--- a as integer
Coordinates=3+n;
a= test(n,Coordinates) %<--- a as result
end
test should be returning two values and not arrays (you will need to correct this code), and so you would do something like
a=5;
for n=1:a
Coordinates=3+n;
[aValue, bValue] = test(n,Coordinates);
end
then store aValue into an array so that you don't overwrite it on each iteration of the loop
a=5;
myData = zeros(a,1);
for n=1:a
Coordinates=3+n;
[aValue, bValue] = test(n,Coordinates);
myData(n) = aValue;
end
then return myData in the signature of your function (not a).
4 Kommentare
Geoff Hayes
am 17 Jun. 2022
You could try changing this code to
function [A, B]= test(n,Coordinates)
A = Coordinates*3;
B = A*Coordinates*6;
end
though the n can be removed since it is no longer relevant. It isn't clear to me why b isn't being set...it does for me when I try it.
A couple more things from
function [myData1,aValue,bValue,n] = Untitleddd(Coordinates)
a=5;
myData1 = zeros(a,1);% Added
for n=1:a
Coordinates=3+n;
[aValue, bValue] = test(n,Coordinates);
myData1(n)= aValue(n);%Added
end
end
Coordinates is passed in as an input parameter but is reset with 3+n. Is this intentional? Also, since test doesn't return arrays, then just do
myData1(n)= aValue;
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