Can I rename the dependencies of an anonymous function?

3 visualizaciones (últimos 30 días)
ALVARO
ALVARO el 22 de Abr. de 2023
Comentada: Star Strider el 22 de Abr. de 2023
I am writing an FEA code trying to minimize memory allocation and improve speed in MATLAB. For that purpose I want to declare my element stiffness matrix using a combination of anonymous functions. Although I have been successful, at the time of evaluation I need too many input arguments, and it makes sense to group them in vectors to improve readability. Below I expplain it a bit more.
Although I could declare my anonymous functions as:
f = @(x) x(1)^2 + x(2)^2;
Because I am using symbolic differentiation I need to declare as:
f = @(x,y) x^2 + y^2;
syms x y real
g = matlabFunction([diff(f,x);diff(f,y)]);
My question is if it is possible to rename the dependencies of " g " after the derivative operation is done. I obtain "g" as a function of "x" and "y", but I would like to transform it into a function of
Finally, it would be nice if the function depends on x and y, even though the derivative does only depend on one of them, let's say , that you can still call it as

Respuesta aceptada

Star Strider
Star Strider el 22 de Abr. de 2023
I am not certain what you want to do, however it seems that you want to compbine both of the arguments into a single vector.
syms x y real
f(x,y) = x^2 + y^2;
g = matlabFunction(f, 'Vars',{[x,y]})
g = function_handle with value:
@(in1)in1(:,1).^2+in1(:,2).^2
The two variables are now combined into one row vector called ‘in1’ so that ‘x’ is ‘in1(:,1)’ and ‘y’ is ‘in1(:,2)’.
.
  3 comentarios
ALVARO
ALVARO el 22 de Abr. de 2023
Thank you both, this is an absolute artwork
Star Strider
Star Strider el 22 de Abr. de 2023
As always, my (our) pleasure!

Iniciar sesión para comentar.

Más respuestas (0)

Productos


Versión

R2022b

Community Treasure Hunt

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

Start Hunting!

Translated by