Why am I not getting all the outputs mentioned in my function ?

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Agnivo Gosai 2015-9-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/240104-why-am-i-not-getting-all-the-outputs-mentioned-in-my-function

评论： Star Strider 2015-9-5

*The code for my function is given below*
As written in the function statement, I want to have all three of rs2,x,y in my output. However I am getting only rs2 and not x and y. I can not figure out why , please help.
function[rs2,x,y]= rwn(nt)
  nt = 3;
  fprintf('The number of jumps = %d',nt)
  x(1)=0;% start particle at the origin
  y(1)=0;% start particle at the origin
  rs2(1)=0; % square displacement is 0 for first step
    % create a list of random numbers ranging from 1 to 4, with nt entries
    fd=ceil(4.*rand(nt,1))
    % the next two lines define the jumps on the square lattice: right,up, left, down
    delx = [1 0 -1 0];
    dely = [0 1 0 -1];
    % loop over the nt jumps, adding the jump vector choosing the random
    %number from the list generated earlier
    for j=1:nt % sum over nt jumps
    x(j+1)=x(j)+delx(fd(j)); % x position at j+1 jump
    y(j+1)=y(j)+dely(fd(j)); % y position at j+1 jump
    rs2(j+1)=x(j+1)^2 + y(j+1)^2; % square displacement position at j+1 jump
    end
    end

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Answer 1

Star Strider 2015-9-5

0
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https://ww2.mathworks.cn/matlabcentral/answers/240104-why-am-i-not-getting-all-the-outputs-mentioned-in-my-function#answer_191439

在 MATLAB Online 中打开

Call your function in your calling script as:

[rs2,x,y]= rwn(nt);

If you only call it with one return variable, only the first is returned by default. If you call it with two, the first two, and with three, all three.