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IP属地：加州
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Recursion on Tree
Recursion on Tree Q: for each node in a tree, store the number of nodes in its left chi...
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Binary TreeBinary Tree definition: at most two children Tree Traverse pre-order: 先序遍历 left and the...
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Python Queue and Stack
Python Queue and Stack Queque FIFO: first-in first-out the oldest one is the first one ...
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Introduction To Statiticsunderstand p-valueit is a probabilitynon hypothesismore extreme case if p-value == 0.05...
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Feature SelectionFeature Selection Ensemble Learning bagging method and boosting method Bagging sampling...
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sorting algorithoms
Bubble Sort Selection Sort Insertion Sort search : O(n) or O(logn)insert: O(n)time O(n^...
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2018-10-22
reverse list find mid remove all nodes in a head add two linkedlist 大数相加64位: 64个二进制，CPU...
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Nonelinear ModelNonelinear Model Decision Tree decision tree is a supervised prediction modelit is usua...
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Overfitting and RegularizationOverfitting and Regularization What should we do if our model is too complicated?Fundam...
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Linear Regression & Logistic RegressionRandom Variable: its variable changes due to chance can be a combination: Y = [y1, y2, ...
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Python Basic
python is an interpreter language Variables and Basic Statements: 2/3 = 0 #python22/3 =...
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LinkedList
LinkedList using python 2 Why LinkedList? model the linked based relationship directly ...
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Fundamentals of Probability
Conditional Probability: Given B is ture, probability of A is true: P(A|B) Chain Rule:P...
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