Tag：Raw data
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From construction to use, how does openLooKeng implement Hash Join?
Hash Join is one of the common ways to join multiple tables. How to build and implement Hash Join on openLooKeng? What Join types does openLooKeng support? In this issue, the community partners will share the [implementation principle of openLooKeng Hash Join], from construction to use, the content is very detailed, I hope it will […]
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Go Clearance 14: The difference between values, references and pointers in parameter passing
value type, reference type 1. In the Go language, value types and reference types have the following characteristics: a、value type: basic data types, int, float, bool, string, as well as arrays and structsFeatures: Variables store values directly, and memory is usually stored instack allocation, the stack will be released after the function call b、reference type: […]
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R language structural equation model SEM multiple regression and model diagnosis analysis student test score data and visualization
Original link: http://tecdat.cn/?p=24694 This article first shows how to import data into R. Then, the correlation matrix is generated, and then the regression analysis of two predictive variables is carried out. Finally, it shows how to output the matrix as an external file and use it for regression. Data entry and cleaning First, we will […]
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How synthetic data is applied to machine learning models (anti financial fraud and privacy data) 
In the article “the advantages of synthetic data over real data”, we focus on how to apply synthetic data to the training of computer vision models. In the article, we mentioned that another application scenario of synthetic data is tabular data. In the following, we will explain how to use synthetic data to help train […]
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Vue3 family bucket upgrade guide II differences between ref, toref and torefs
Ref is a copy of the original data. When the ref data is modified, the view in the template will change, but the original data will not change.Toref is a reference to the original data. When you modify the toref data, the original data will also change, but the view will not be updated. Ref […]
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Feature Engineering in machine learning (I) — Overview
preface Last month, I participated in the wechat big data challenge. Because it was the first time to participate in a similar competition, I didn’t have any experience and didn’t enter the semi-finals in the end. However, during this period, I still learned a lot of knowledge, especially the content related to feature processing. For […]
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Introduction to machine learning – predict the survivors on the Titanic and be familiar with the basics of machine learning
Background knowledge: In April 1912, the Titanic set out from Southampton, England and passed through France and Ireland. It touched an iceberg and sank in the Atlantic Ocean of the United States. Some people survived and some did not survive. In this case, it is necessary to predict the test through the algorithm of machine […]
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R language | n k-fold cross validation (based on logistic regression)
Welcome to my official account.A diligent research cat N times of k-fold cross validation catalogue Introduction to k-fold cross validation R language n times k-fold cross validation Comparison of different K values 1. Basic introduction of cross validation Usually, after the model is established, external verification is needed to evaluate the external availability of the […]
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Vue3. Differences among ref, toref and torefs in 0
Vue3. Difference between 0 ref, toref and torefs Ref is a copy of the original data. When the ref data is modified, the view in the template will change, but the original data will not change.Toref is a reference to the original data. When you modify the toref data, the original data will also change, […]
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Android uses serializable and Parcelable serialization
Use and difference of Android serializable and Parcelable serialization 1： Serializable 1. What is serializationThe process of transforming a class object into a storable and transportable state.2. What is serializable interfaceAn object serialization interface. Only when a class implements the serializable interface can its objects be serialized.3. Why serialize objects1. The process of converting an […]
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Vue restores the initial data this$ data,this.$ options. data())
Vue recover initial data When Vue is open, we will encounter a page or a pop-up window to restore it to the original data. If there is not much data, we can reset the assignment, but it will be more troublesome when there are many data. We can use it at this time this.$data，this.$options this.$ […]
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Pandas drawing
objective Just to record the drawing skills encountered in learning Draw density map Sometimes we need to count the frequency of each value in a column, that is, the density map Drawing method raw dataWe want to plot the value distribution code import matplotlib.pyplot as plt DF. Value. Plot (kind =’kde ‘, color =’ Red […]