清空筛选条件
清空筛选条件

How to use a function output in another function?

1 次查看（过去 30 天）
Larry
Larry 2014-1-25
编辑： Stephen23 2020-9-5
I have written a function in the script, say
function A = matrixy()
A = zeros(3);
end
When calling it in the command window, I'll have
>>matrixy
ans =
0 0 0
0 0 0
0 0 0
But when I key in A in the command window, it shows "Undefined function or variable 'A'". Is there a way to let A pick up this value in the command window?
Also, I want to create another function and use this matrix A produced in the previous function. How should I do it?
Many thx!
  1 个评论
Stephen23
Stephen23 2017-8-11
编辑：Stephen23 2020-9-5
How to assign output arguments to variables is also covered in the introductory tutorials:
https://www.mathworks.com/help/matlab/getting-started-with-matlab.html
Doing the introductory tutorials teaches lots of these basic concepts, which saves time in the long run.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Amit
Amit 2014-1-25
编辑：Amit 2014-1-25
A = matrixy;
A function has an output and the name. Unless you define the output, it goes to ans variable.
  2 个评论
Fernadez
Fernadez 2017-8-10
I don't think Amit answer is correct, I am having the same question. if A = matrix, you are running the whole function all over again. if you run the function, how do you save the result "A", and how to you call "A" an input to the second function?
Walter Roberson
Walter Roberson 2017-8-10
A = matrixy();
calls matrixy once (per time that you execute the statement), and assigns the output of running matrixy() the variable "A" in your current workspace.
You can then pass A to another routine, such as
sqrt(A)
If you do not need the output for second purposes, you can just directly call
sqrt(matrixy())

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 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