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How to use the steepest descent method to solve a function.

27 Ansichten (letzte 30 Tage)
mandoo511
mandoo511 am 6 Apr. 2015
I have an example but I still am not sure how to solve this problem. Please show me step by step on how to attack this. Thank you.

Antworten (2)

Vinod Sudheesh
Vinod Sudheesh am 26 Jun. 2015
Bearbeitet: Vinod Sudheesh am 26 Jun. 2015
Hello,
The below code snippet solves this problem using the "Gradient Descend Algorithm"
clc;
clear;
f=@(x)(25*x(1)*x(1)+20*x(2)*x(2)-2*x(1)-x(2));
x=[3 1]';
gf=@(x)([(50*x(1)-2) ; (40*x(1)-1)]);
n=1;
while(norm( gf(x))>0.05)
x= x-0.01*(1/n) *gf(x);
n=n+1;
end
Note that to solve this problem using the "Steepest Descend Algorithm", you will have to write additional logic for choosing the step size in every iteration.
  1 Kommentar
Sarvjeet Singh
Sarvjeet Singh am 28 Sep. 2020
f=@ (x,y) a*(exp(bx))+c*x
how to solve
determine the general parameters for the non-linear fit using steepest descent method if the fit is given by for the data:

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seyed mohammad javad nikouei
why solve in matlab by steepest descent?

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