如何在Matlab中返回列表？

Question

Let me first start by saying that I am not good at programming yet. I have the following exercise:

Define a function which iterates the Ricker model a total of 600 times for a particular value of a . The arguments of the function should be the parameter a and the initial condition x0 . Your procedure should return a list (for example, mylist ) that contains the coordinates for the points that will appear in the Feigenbaum diagram. Note that you do not create coordinates for the first 500 iterates, only for last 100 iterates. Hint: Each coordinate in the list should be of the form [a,iter] not [i,iter] . Make sure your program returns the values in the list.

Here's what I have so far:

function y = ex824(a)
    RM      = @(x) a*x.*exp(-x);
    prompt  = 'Specify an initial condition: ';
    result  = input(prompt);
    iter(1) = result;

% collecting list of x-coordinates
    for i = 1:601,   
        X(i) = i - 1;
    end

% collecting list of y-coordinates
    for i = 1:600,
        Y(i+1)      = RM(iter(i));
        iter(i+1)   = Y(i+1);
    end

    y = plot(X, Y, '*');
end 

I have a couple of matlab programming books, but I've been reading for days and have yet to come across something that shows me how to return a list. Can anyone help?

Answer 1

All you need to do is to generate a list and assign this to your return variable.

function a = testReturnList(size)
  a = ones(size, 1);
  %a = [1;2;3];
end