Find the minimum of a multi-variable function
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emonhossain roy
le 23 Juin 2019
Modifié(e) : infinity
le 23 Juin 2019
Question: Find the minimum of in the window [0,2]×[2,4] with increment 0.01 for x and y.
My approach:
syms fun(x,y) fx(x,y) fy(x,y) fxy(x,y) x y
=;
;
;
;
pt=solve([==0,==0],[x y]) But it gives me an error.
besides what about the window and increment mentioned that question. Any solution will be appreciated .
Thanks in advance .
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infinity
le 23 Juin 2019
Modifié(e) : infinity
le 23 Juin 2019
Hello,
In your code, it was not good to put the name like "fun(x,y)". Also, we do not need to declare "fx, fun, fy,.." as symbolic variable. Here is a small code that you can refer
clear
syms x y
fun=x^2+y^2-2*x-6*y+14;
fx=diff(fun,x);
fy=diff(fun,y);
pt=solve([fx==0,fy==0],[x y]);
% pt=solve(fx==0,fy==0);
sol = struct2array(pt)
It will give us the solution
sol =
[ 1, 3]
I have run this code on Matlab2018a. Maybe in your Matlab version, there will be some different.
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