清空筛选条件
清空筛选条件

sub-gradients - reg

5 次查看（过去 30 天）
Kallam Haranadha Reddy
回答： Walter Roberson 2018-12-25
clear all
close all
clc
f1=zeros(1,100);
f2=zeros(1,100);
f3=zeros(1,200);
c1=randi([1,20],1,100);
c2=randi([1,20],1,100);
y(1,1:200)=rand(1,200);
f1(1,1:100)=[y(1,1:100).*c1];
f2(1,1:100)=[y(1,101:200).*c2];
f3(1,1:200)=horzcat(f1,f2);
g1=zeros(1,100);
g2=zeros(1,100);
g1=gradient(f1,y(1:100));
g2=gradient(f2,y(101:200));
g=horzcat(g1,g2);
my question is whether g1 and g2 are sub-gradients of f1 and f2 respectively in the above code
  4 个评论
显示 2更早的评论
Walter Roberson
Walter Roberson 2018-12-24
What is a "sub gradient" ?
Kallam Haranadha Reddy
Kallam Haranadha Reddy 2018-12-25
sub gradient method as used in lagrangian decomposition and lagrangian relaxation algorithms

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2018-12-25
my question is whether g1 and g2 are sub-gradients of f1 and f2 respectively in the above code
No. Lagrangian sub-gradient methods apply to functions, but you do not have functions.
gradient() applied to numeric matrices is numeric differences, and the second and following arguments give the step sizes.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Optimization 的更多信息

标签

产品


版本

R2015b

Community Treasure Hunt

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

Start Hunting!

Translated by