Definition of successive descent method:
For a given set of equations, use the formula:where k is the number of iterations (k=0,1,2,... )The method of finding approximate solution by stepwise generation is called iterative method
If it exists (recorded as), it is said that this iterative method converges, obviously is the solution of the equations, otherwise called this iterative method divergence.
Study the convergence of {}. Introducing Error Vectors:Get:Recursion gets:To inve
Earlier, we mentioned supervised learning, which corresponds to non-supervised learning in machine learning. The problem with unsupervised learning is that in untagged data, you try to find a hidden structure. Because the examples provided to learners arenot marked, so there
Experimental purposes
Recently intend to systematically start learning machine learning, bought a few books, but also find a lot of practicing things, this series is a record of their learning process, from the most basic KNN algorithm began; experiment Introduction
Language: Python
GitHub Address: LUUUYI/KNNExperiment
Vi. more hyper-parameters in grid search and K-nearest algorithmVii. Normalization of data Feature ScalingSolution: Map all data to the same scaleViii. the Scaler in Scikit-learnpreprocessing.pyImportNumPy as NPclassStandardscaler:def __init__(self): Self.mean_=None Self.scale_=NonedefFit (self, X):"""get the mean and variance of the data based on the training data set X""" assertX.ndim = = 2,"The dimension of X must be 2"Self.mean_= Np.array ([Np.mean (X[:,i]) forIinchRange (x.shape[1]))
1. The complete course of statistics all of statistics Carnegie Kimelon Wosseman
2. Fourth edition, "Probability Theory and Mathematical Statistics" Morris. Heidegger, Morris H.degroot, and Mark. Schevish (Mark j.shervish)
3. Introduction to Linear algebra, Gilbert. Strong--Online video tutorials are classic
4. "Numerical linear algebra", Tracy Füssen. Lloyd and David. Bao
Textbooks suitable for undergraduates
5. Predictive data analysis of machine
Analytical:Two categories: Each classifier can only divide the samples into two categories. The prison samples were warders, thieves, food-delivery officers, and others. Two classifications certainly won't work. Vapnik 95 proposed to the basis of the support vector machine is a two classification classifier, this classifier learning process is to solve a positive and negative two classification derived fro
reinforcement learning, the input data directly feedback to the model, the model must be immediately adjusted. Common application scenarios include dynamic systems and robot control. Common algorithms include q-learning and time difference learning (temporal difference learning)Ma
Original address: http://www.cnblogs.com/cyruszhu/p/5496913.htmlDo not use for commercial use without permission! For related requests, please contact the author: [Email protected]Reproduced please attach the original link, thank you.1 BasicsL Andrew NG's machine learning video.Connection: homepage, material.L 2.2008-year Andrew Ng CS229 machine LearningOf course
I. Working methods of machine learning
① Select data: Divide your data into three groups: training data, validating data, and testing data
② model data: Using training data to build models using related features
③ validation Model: Using your validation data to access your model
④ Test Model: Use your test data to check the performance of the validated model
⑤ Use model: Use fully trained models to mak
Nonlinear Transformation (nonlinear conversion)
ReviewIn the 11th lecture, we introduce how to deal with two classification problems through logistic regression, and how to solve multiple classification problems by Ova/ovo decomposition.
Quadratic hypothesesThe two-time hypothetical space linear hypothetical space is extremely flawed:
So far, the machine learning model we have introduced is linear model,
Octave Machine Learning Common commands
A, Basic operations and moving data around
1. Attach the next line of output with SHIFT + RETURN in command line mode
2. The length command returns a higher one-dimensional dimension when apply to the matrix
3. Help + command is a brief aid for displaying commands
4. doc + command is a detailed help document for displaying commands
5. Who command displays all current
This paper is organized from the "machine learning combat" and Http://write.blog.csdn.net/posteditBasic Principles of Mathematics:
Very simply, the Bayes formula:
Base of thought:
For an object to be sorted x, the probability that the thing belongs to each category Y1,y2, which is the most probability, think that the thing belongs to which category.Algorithm process:
1. Suppose something to be sorted x, it
Reprint Please specify source: http://www.cnblogs.com/ymingjingr/p/4271742.htmlDirectory machine Learning Cornerstone Note When you can use machine learning (1) Machine learning Cornerstone Note 2--When you can use
Reprint Please specify source: http://www.cnblogs.com/ymingjingr/p/4271742.htmlDirectory machine Learning Cornerstone Note When you can use machine learning (1) Machine learning Cornerstone Note 2--When you can use
Reprint Please specify source: http://www.cnblogs.com/ymingjingr/p/4271742.htmlDirectory machine Learning Cornerstone Note When you can use machine learning (1) Machine learning Cornerstone Note 2--When you can use
Reprint Please specify the Source: http://www.cnblogs.com/ymingjingr/p/4271742.htmlDirectoryMachine learning Cornerstone Note When machine learning can be used (1)Machine learning Cornerstone Note 2--When you can use machine
Which programming language should I choose for machine learning ?, Machine Programming Language
Which programming language should developers learn to get jobs like machine learning or data science?
This is a very important issue. We have discussed this issue in many forums.
years later, more and more people began to use neural network to process images, whether it is Google LeNET, Vgg, or Caffe, Torch, need to do deep learning experiments in so many architectures, it takes a week, one months to know the results of the experiment. ”Chieh said, especially in the 2015 Imagenet competition, Microsoft's latest "deep residual network" can reduce the error rate of image recognition
Tags: virtual machine installation
Connect to the Linux virtual machine learning environment Build-Virtual machine Create "click" to open this virtual machine, enter the system installation interface.650) this.width=650; "Src=" Https://s1.51cto.com/oss/201711/17/0f55f83d
:
, where θ is the vector of (n+1) x1, x is the vector of (n+1) x1, ∙.
We all use vectors to represent the hyper-plane behind.
Except that θ is called a weight, and b is biased, so the complete expression of the super plane is:θ*x+b=0
The Perceptron model can be defined as y=sign (θ∙x+b) where:
If we call sign the activation function, the difference between the perceptual machine and the logistic regression is that the sign,logistic regression acti
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