lsqnonlin for 2 independent variables

9 visualizaciones (últimos 30 días)
dhlee
dhlee el 29 de Ag. de 2021
Respondida: Rik el 29 de Ag. de 2021
I want to find 2 variables(x,y -> complex number) with lsqnonlin function.
For example, I have 2 equations and 2 variable DATA.
Please check and advise my code. Thank you~
<DATA>
S11=1+i;
S21=2+2i;
<EQUATION>
1) S11=x*y+i*(x+y)
2) S21=x*y-i*(x^2+y^2)
---------------------
clear all;
clc;
close all;
S11=1+i;
S21=2+2i;
x0=0.1+0.1i;
y0=0.2+0.2i;
F = @(x) myfun_lsq(x,y,S11,S21)
x=lsqnonlin(F,x0)
y=lsqnonlin(F,y0)
function F = myfun_lsq(x,y,S11,S21)
Fc1=x*y+i*(x*y)-S11;
Fc2=x*y-i*(x^2+y^2)-S21;
F = [Fc1, Fc2];
end

Respuesta aceptada

Rik
Rik el 29 de Ag. de 2021
You should merge x and y to a single variable (i.e. a 2 element vector). That way you can do this with a single call to lsqnonlin.
And you should remove that clc, clear all, close all. You don't need it and using it is a clear indication you don't know what you want to happen. Are you opening any figures? Do you really want to reduce the performance of several functions by wiping the optimization from memory with clear all?

Más respuestas (0)

Community Treasure Hunt

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

Start Hunting!

Translated by