WebApr 11, 2024 · 4.利用迭代函数fmincg求出代价函数最小(梯度grad=0)时的theta值,与之前的梯度下降法不断更新theta值类似。 需要编辑以下的红色文件。(后续部分,需要填入的代码为深色框,已经提供的代码为浅色框。 WebApr 13, 2024 · By the way: why did you put "clear all" in as part of your code? "clear all" inside a program asks the program to try to do its best to remove all state from MATLAB -- including the state that is recording the fact that the program is running. It is Wile E. Coyote blowing up the bridge that he is standing on, but expecting not to fall down.
机器学习编程作业ex4(matlab/octave实现)-吴恩达coursera_fmincg函数…
WebMar 20, 2024 · matlab精度检验代码###神经网络模板 ####描述 这是一个用于分类的3层正则化神经网络,已在MATLAB和Python中实现。Logistic Sigmoid用作激活函数。 通过使用fmincg或fminunc(MATLAB / Octave)和fmin_cg(Python)最小化平方误差成本函数来学习权重。MATLAB代码基于的示例4。Python代码改编自MATLAB版本,并使用numpy ... WebCall fminunc to find a minimum of fun near [1,1]. x0 = [1,1]; [x,fval] = fminunc (fun,x0) Local minimum found. Optimization completed because the size of the gradient is less than the value of the optimality tolerance. x = 1×2 2.2500 -4.7500. inclusive vs accessible
algorithm - Octave:逻辑回归:fmincg和fminunc之间的差异
Web(我正在将fmincg函数fminunc的结果与相同的数据进行比较) 所以,我的问题是:这两个函数之间有什么区别?每个函数都实现了什么算法?(现在,我只是使用这些函数,而 … Web提供fmincg函数文档免费下载,摘要:function[X,fX,i]=fmincg(f,X,options,P1,P2,P3,P4,P5)%Minimizeacontinuousdifferentialblemultivariatefunction.Startingpoint Web注明:本文仅作为记录本人的日常学习历程而存在。 这次要实现的功能是使用已经划分为两类的数据进行训练参数theta,得到theta后,任意给出一组数据,与theta相乘,得到一个0-1之间的小数,分别对应了1st类和2nd类。1.使用的训练数据集如下Id,SepalLengthCm,SepalWidthCm,PetalLengthCm,PetalWidthCm,Species1,5.1,3 inclusive vs exclusive logic