Matlab-具有多​​个输入的错误 [英] Matlab - bug with multiple inputs

问题描述

这是我的功能:

function [o1  o2] = f(t, y)
o1 = y(2);
o2 = -sin(y(1));
end

当我从命令提示符处调用它时:

When I call it from command prompt:

f(1, [2,3])
ans = 3

为什么我只看到o1? 而且，这不起作用

why do I only see o1? Also, this doesn't work

feval(f, 1, [2 3])

错误消息是

Input argument "y" is undefined.

Error in ==> f at 2
o1 = y(2);

请帮助，我不知道发生了什么事.

Please help, I have no idea what's going on.

推荐答案

feval应该已使用函数句柄或字符串调用，因此请使用

feval should have been called with a function handle or string, so use

feval(@f, 1, [2,3])

或

feval('f', 1, [2,3])

您将看到，这也仅返回该函数的第一个输出.要接收更多输出，您必须分配它们，例如

As you will see this also returns just the first output of the function. To receive further outputs you must assign them, e.g.

[o1, o2] = feval(@f, 1, [2, 3])

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