octave fminunc

发布时间：2020-12-16 09:32:46 所属栏目：安全来源：网络整理

导读：被调用的函数costFunction.m为: function [jVal,gradient] = costFunction(theta)jVal = (theta(1)-5)^2 + (theta(2)-5)^2;gradient = zeros(2,1);gradient(1) = 2*(theta(1)-5);gradient(2) = 2*(theta(2)-5); ?octave程序为: options = optimset(‘GradObj

被调用的函数costFunction.m为:

function [jVal,gradient] = costFunction(theta)

jVal = (theta(1)-5)^2 + (theta(2)-5)^2;

gradient = zeros(2,1);
gradient(1) = 2*(theta(1)-5);
gradient(2) = 2*(theta(2)-5);

?octave程序为:

options = optimset(‘GradObj‘,‘on‘,‘MaxIter‘,‘100‘)
initialTheta=zeros(2,1)
[optTheta,functionVal,exitFlag] = fminunc(@costFunction,initialTheta,options)

?输出为:

options =? scalar structure containing the fields:??? GradObj = on??? MaxIter = 100initialTheta =?? 0?? 0optTheta =?? 5.0000?? 5.0000functionVal =?? 1.5777e-030exitFlag =? 1

（编辑：李大同）

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