1. Feedforward and cost function; 2.Regularized cost function: 3.Sigmoid gradient The gradient for the sigmoid function can be computed as: where: 4.Random initialization randInitializeWeights.m function W = randInitializeWeights(L_in, L_out) %RANDIN…
Handwritten digits recognition (0-9) Multi-class Logistic Regression 1. Vectorizing Logistic Regression (1) Vectorizing the cost function (2) Vectorizing the gradient (3) Vectorizing the regularized cost function (4) Vectorizing the regularized gradi…
源码:https://github.com/cheesezhe/Coursera-Machine-Learning-Exercise/tree/master/ex5 Introduction: In this exercise, you will implement regularized linear regression and use it to study models with different bias-variance properties. 1. Regularized Lin…
1. Sigmoid Function In Logisttic Regression, the hypothesis is defined as: where function g is the sigmoid function. The sigmoid function is defined as: 2.Cost function and gradient The cost function in logistic regression is: the gradient of the cos…
(1) How to comput the Cost function in Univirate/Multivariate Linear Regression; (2) How to comput the Batch Gradient Descent function in Univirate/Multivariate Linear Regression; (3) How to scale features by mean value and standard deviation; (4) Ho…
Machine Learning, Homework 9, Neural NetsApril 15, 2019ContentsBoston Housing with a Single Layer and R package nnet 1Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Digit Recognition wit…
MetaPruning 2019-ICCV-MetaPruning Meta Learning for Automatic Neural Network Channel Pruning Zechun Liu (HKUST).Xiangyu Zhang (MEGVII).Jian Sun(MEGVII) GitHub:251 stars Citation:20 Motivation A typical pruning approach contains three stages: training…
MetaPruning: Meta Learning for Automatic Neural Network Channel Pruning 2019-08-11 19:48:17 Paper: https://arxiv.org/pdf/1903.10258.pdf Code: https://github.com/liuzechun/MetaPruning 1. Background and Motivation:…
CS229 Machine Learning Stanford Course by Andrew Ng Course material, problem set Matlab code written by me, my notes about video course: https://github.com/Yao-Yao/CS229-Machine-Learning Contents: supervised learning Lecture 1 application field, pre-…
1. advantage: when number of features is too large, so previous algorithm is not a good way to learn complex nonlinear hypotheses. 2. representation "activation" of unit i in layer j matrix of weights controlling function mapping from layer j to…