Assign separate handles to function outputs

2 次查看（过去 30 天）
Lukas Bystricky
Lukas Bystricky 2015-8-25
编辑： Matt J 2015-8-25
I have a function that returns two outputs, the function value and its derivative. I'd like to create separate handles to the function value and the derivative. Is this possible?
For clarity, I'd like to do something like this:
function [f, fdx] = get_values(x)
...
end
f = @(x) get_values(x) %first output
g = @(x) get_values(x) %second output somehow, not sure how to do this

请先登录，再回答此问题。

回答（1 个）

Matt J
Matt J 2015-8-25
编辑：Matt J 2015-8-25
Create an additional function
function fdx=get_fdx(x)
[~,fdx]=get_values(x);
end
and now
f = @get_values%first output
g = @get_fdx %second output somehow, not sure how to do this
  2 个评论
Walter Roberson
Walter Roberson 2015-8-25
I agree. Notice that you need a real function for this, not an anonymous function. MATLAB does not provide any mechanism to access any function output other than the first except for the case that the output is being assigned to a location with "=". You cannot access the second output of a function from within an anonymous function.
Matt J
Matt J 2015-8-25
编辑：Matt J 2015-8-25
If you return the arguments as structure fields,
function out = get_values(x)
....
out.f=f;
out.fdx=fdx;
end
then you can do things like,
f = @(x) getfield(get_values(x),'f') %first output
g = @(x) getfield(get_values(x),'dfx') %second output

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Whos 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by