Anonymous Functions with Multiple Inputs ignore some inputs

6 次查看（过去 30 天）
Jun Liang
Jun Liang 2022-6-6
评论： Jun Liang 2022-6-18
For example, the function is: , then
But I want to do this: or , and so on
y=@(x,theta) x.^theta
y(2,3)=8 % 2^3=8, succeed
% But I want is :
y(2, theta) % My ideal output is: 2.^theta but it doesn't work
y(x, 2) % I need is: x.^2
hope I made it clear enough....
  3 个评论
显示 1更早的评论
Walter Roberson
Walter Roberson 2022-6-6
Symbolic is good for this purpose.
In the special case where you do not capture any variables in the anonymous function handle, you could use formula() on the handle, and do text processing to replace all references to the parameter with the numeric constant, and strip the name out of the @() section, and then use str2func. Symbolic toolbox is much more convenient though... especially if you need to get right the possibility that the anonymous function has an anonymous function with the same parameter name
@(x,y) y.^integral(@(x)x.^2, 0,x)
The @(x)x.^2 should not be replaced when x is being replaced with something constant in the anonymous function...
Jun Liang
Jun Liang 2022-6-18
Thanks, I have used symbolic toolbox to solve this problem.
code:
syms phi(x, theta)
phi(x, theta) = x.^theta;
% phi(2,theta) or phi(x,2) are working

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Mathematics 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