根在函数中不起作用 [英] roots doesn't work in a function

问题描述

我想在函数中使用matlab函数的根.

I want to use the matlab function roots in a function.

但是它不起作用.我不知道如何解决这个问题.

But it doesn't work. I have no idea how to solve that problem.

这是函数:

function [ roots , poles ] = pr_calc( num , den )
%PR_CALC Summary of this function goes here
%   Detailed explanation goes here


poles=roots([den]);
roots=roots([num]);

end

这是错误消息:

??? At compilation, "roots" was determined to be
a variable and this
 variable is uninitialized.  "roots" is also a
 function name and previous versions of MATLAB
 would have called the function.
 However, MATLAB 7 forbids the use of the same
 name in the same
 context as both a function and a variable.

Error in ==> pr_calc at 6
poles=roots([den]);

推荐答案

我认为matlab实际上会告诉您您需要了解的所有内容.您已经定义了一个名为"roots"的变量作为函数的返回值，但是"roots" 已经是一个函数，因此不允许使用相同的名称.试试这个:

I think matlab is telling you everything you need to know, actually. You have defined a variable called "roots" as the return value from your function, but "roots" is already a function, so you are not allowed to use the same name. Try this:

function [ myroots , poles ] = pr_calc( num , den )
%PR_CALC Summary of this function goes here
%   Detailed explanation goes here


poles=roots([den]);
myroots=roots([num]);

end

这篇关于根在函数中不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！