simple question: open another m file

2011 3 5
1 个回答
回答已采纳
7 次查看（30 天）

0 个投票

sorry to ask. if I sub 2 variables(x,y) from the currently running first.m into second.m, and second.m will return 2 variables (a,b) back to first.m. I should write this in first.m:
[a,b]=second(x,y);
PS.the location of first.m and second.m is the same.
error message is: ??? Attempt to execute SCRIPT second as a function: C:\second.m

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2011-3-5

0 个投票

You can only use that syntax if the first line of the file second.m (that is not whitespace or all comments) starts with the keyword "function", such as
function [p,q] = second(m,n)
If second.m does not start with "function" then it is called a "script". Scripts cannot be passed parameters and cannot return values. Scripts do not have dummy parameter names like functions do. On the other hand, scripts have access to all of the variables of the function that starts them, and can read and write to those variables directly.

5 个评论
显示 3更早的评论 隐藏 3更早的评论

Hello Blower
Hello Blower 2011-3-5
if i don't need return values, can i write like:
second(x,y);
thank you
Walter Roberson
Walter Roberson 2011-3-5
You can do that if and only if "second" is defined as a function. If "second" is a script instead of a function, you cannot have anything after it (except comments) until the end of the statement.
Hello Blower
Hello Blower 2011-3-5
how to define it is function or script?
Hello Blower
Hello Blower 2011-3-5
I have sent you mentioned program. can you help me to check what cause the problem?
Thanks a lot.
Hello Blower
Hello Blower 2011-3-5
Sorted. I found I have to add "function [a,b] = second(x,y)" at the first line of second.m to make it as a function.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 File Operations 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by