Storing Outputs of a two output function recursion

Is there a method where I can apply a function with two outputs, and iterate the function recursively for these two outputs. In other words, I want this function to be applied on both outputs of this function until satisfying a condition(in a while loop),

UPDATE:I tried the recursion provided here by Image analyst ,https://www.mathworks.com/matlabcentral/answers/47182-problem-in-recursive-function, it worked well, but I want to keep storing all the outputs in 1 cell structure, is it possible?

[farah fadel]

I tried the answer provided here by Image analyst ,https://www.mathworks.com/matlabcentral/answers/47182-problem-in-recursive-function, it worked well, but I want to keep storing all the outputs in 1 cell structure, is it possible

Answer 1

[Fangjun Jiang]

Yes. There is no limitation on the number of outputs for recursive function.

[farah fadel]

But how I can store all the outputs in one array

[Fangjun Jiang]

Like this? It is not a recursive fuction. Just while-loop

x=100;y=200;
k=0;
while x>1e-3 && y>1e-4
    k=k+1
    [x,y]=D23(x,y);
end
x
y

function [x,y]=D23(x,y)
x=x/2;
y=y/3;
end

[farah fadel]

no I want to store all the outputs coming of the recursion function. In each iteration of the recursive function, the two outputs should be stored in an cell structure containing all previous otputs too.

[Fangjun Jiang]

Then it is not really an issue related to recursion. It is just storing data. The only thing to take care of is to declare a big enough arry or cell because the number of iteration is not determined. You can remove the un-used array space at the end.

x=100;y=200;
k=0;
result=ones(100,2);

while x>1e-3 && y>1e-4
    k=k+1
    [x,y]=D23(x,y);
    result(k,:)=[x,y];
end
result(k+1:end,:)=[]

function [x,y]=D23(x,y)
x=x/2;
y=y/3;
end