从Matlab函数返回多个输出变量 [英] return multiple output variables from Matlab function

问题描述

让我说我有一个功能:

function [ A, B, C ] = test(x, y, z)
    A=2*x;
    B=2*y;
    C=2*z;
end

按run键时，Matlab仅从输出参数中返回第一个值-在这种情况下为[A].我是否可以在函数中放入一条命令，该命令自动返回所有函数输出参数[A,B,C]而不是仅返回第一个参数. 我知道我可以在命令窗口[ A, B, C ] = test(x, y, z)中键入并获取所有值，但是有时我很懒，并且只想按Run(运行)并自动获取所有值即可.

When you press run, Matlab returns only the first value from the output arguments - [A] in this case. Is there a command that I can put inside my function that automatically returns all the function output arguments [A,B,C] instead of just the first argument. I know I can type in my command windows [ A, B, C ] = test(x, y, z) and get all the values, but I am lazy sometimes, and would just like to press Run and get automatically all the values.

推荐答案

某些选项:

添加一个参数以指定控制台的详细输出，但默认情况下将其设置为false:

Add a parameter to specify verbose output the console but set it to false by default:

function [ A, B, C ] = test(x, y, z, verbose)

   if nargin = 3
       verbose = false;
   end;

   A=2*x;
   B=2*y;
   C=2*z;

   if verbose
       fprintf('A = %f\nB = %f\nC = %f', A, B, C);
   end;

end

或将它们合并为一个输出:

or combine them into one output:

function output = test(x, y, z)

   A=2*x;
   B=2*y;
   C=2*z;

   output = [A, B, C]; %// Or {A;B;C} if they're not going to be the same size, but then it won't display anyway

end

或者，如果您真的想要，可以编写一个在函数上调用的包装函数，它会为您显示所有可以在任何函数上通用使用的所有三个函数.但这似乎不值得.

or if you really really want to I guess you could write a wrapper function that you call on your function and it displays all three for you that you could use generically on any function. But that hardly seems worthwhile.

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