logistic regression and binary classification of iris based on TensorFlow

Learning notes of the second edition of Li Hang's statistical learning methods Knowledge points Classification algorithmBelongs to linear modelThe graph is an S-shaped curve, monotonically increasing, and the definition domain is (− ∞, + ∞) and the value domain is (0,1) Logistic regression compares the size of two condition ...

Posted by Placebo on Sun, 17 Apr 2022 09:48:54 +0300

LeetCode question 14: longest common prefix (java)

Title: longest common prefix Write a function to find the longest common prefix in the string array. If there is no public prefix, the empty string '' is returned. Example: Input: strs = ["flower","flow","flight"] Output:"fl" Input: strs = ["dog","racecar","car"] Output:"" Explanation: the input does not have a public prefix. Topic inter ...

Posted by jfs0479 on Sun, 17 Apr 2022 09:21:35 +0300

[408 computer postgraduate entrance examination] data structure -- Chapter III stack, queue and array

Chapter 3 stack and queue 3.1 stack 3.1.1 basic concept of stack 1. Definition of stack A Stack is a linear table that only allows insertion or deletion at one end Important terms: stack top, stack bottom, empty stack Stacking sequence: a1 → a2 → a3 → a4 → a5 Stack out sequence: a5 → a4 → a3 → a2 &rar ...

Posted by Techissue2008 on Sun, 17 Apr 2022 09:04:35 +0300

Monotonic queue - sliding window

dequeue bidirectional queue dequeue<int>que;//Create bidirectional queue que.push_front()//Insert an element in front of the queue que.push_back()//Put an element behind the queue que.pop_front()//Delete the first element of the queue que.pop_back()//Deletes the last element of the queue que.clear()//Clear queue que.empty()//Judge whether ...

Posted by CorkyMcDoogle on Sun, 17 Apr 2022 03:08:30 +0300

Acwing number range - bisection algorithm - java implementation

Dichotomy algorithm The binary algorithm is divided into integer binary and floating-point binary. Floating-point binary is easier I Original question link Given an array of integers of length n in ascending order and q queries. For each query, the start and end positions of an element k are returned (the positions are counted from 0). I ...

Posted by jerbecca on Sat, 16 Apr 2022 17:56:37 +0300

Application and explanation of convolutional neural network CNN based on Pytorch

Application and explanation of convolutional neural network CNN based on Pytorch 1, Convolutional neural network CNN definition Convolutional neural network (CNN, sometimes called ConvNet) is very attractive. In a short time, they have become a subversive technology, breaking all the most advanced algorithms in many fields, such as text, vide ...

Posted by dyip on Sat, 16 Apr 2022 16:54:55 +0300

Basic sorting algorithm

catalogue         1. Select Sorting         2. Bubble sorting         3. Insert sort 1. Select Sorting The main idea of selective sorting is to find the smallest element in the unordered sequence and add it to the existing sequence until the unordered sequence is empty. There is an unordered array, as shown below, which is sorted in as ...

Posted by vtolbert on Sat, 16 Apr 2022 15:53:04 +0300

Path Statistics (classical dfs to dp problem)

In the past two days, I found a very interesting topic, not that it is very difficult, but that this topic is indeed a classic dfs problem, which can be encountered by basic beginners. However, if this is only the case, this topic is not of great value to say, but it is very special that this topic is a classic dfs to dp problem, which I think ...

Posted by kylebragger on Sat, 16 Apr 2022 12:30:19 +0300

Luogu P7291 "EZEC-5" human win enhanced version

Luogu P7291 "EZEC-5" human win enhanced version Note: warm tip: to complete this question, please complete ["EZEC-5" person wins]. ( https://www.luogu.com.cn/problem/P7286) Brief description of topic meaning given k k ...

Posted by wittanthony on Sat, 16 Apr 2022 05:14:59 +0300

Overtime question brushing - parallel query module (java) -- simple questions

Joint search set I Construction of union search set ① Set a set, called the Disjoint Set, to check whether there are rings in the graph ② How to add edges to the set. Take the starting point and ending point of the edge and judge whether the two points are in the set. If they are both, a ring appears. If they are not, put the two point ...

Posted by israely88 on Sat, 16 Apr 2022 02:15:45 +0300