Tag: Data mining

The development tools

Python Stochastic Volatility (SV) model for s&p 500 time series volatility prediction

January 7, 2024

by 劉鈺婷

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Asset prices have volatility over time (the variance of daily returns). In some periods, yields are highly variable, while in others they are very flat....

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Artificial intelligence (ai)

HUSP – ULL algorithm

January 6, 2024

by Janet Bird

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Lqs-tree (lQS-tree), list (lQS-tree), LAR and IIP (IIP) are two efficient pruning strategies that significantly reduce resource consumption during the mining process.

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The development tools

Hupu community forum data crawler analysis report

January 6, 2024

by Chelsea Willis

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Original text: http://tecdat. Hupu is a professional website for young men, covering the original news column video reports of basketball, football, F1, NFL and other...

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The development tools

Stata has interval regression of heteroscedasticity error

January 6, 2024

by Brett Johnson

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In the implementation of Stata, robust options can be used, and when the residual variance is not constant, regular linear regression can be used. The...

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The development tools

Complex Network Analysis in R language: Clustering (Community detection) and visualization

January 6, 2024

by Richard Mcclain

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To process network data with R, we use the wedding data set. + boxed. The next step is igraph. We can get the shortest path...

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The development tools

R language heteroscedasticity regression model modeling: using error variance to explain heteroscedasticity

January 6, 2024

by Samarth Sant

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When OLS estimates are applied to regression models in the social sciences, one of the assumptions is homoscedasticity, and I prefer the constant error variance....

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The development tools

Determining the optimal number of clusters for clustering using R language: 3 clustering optimization methods

January 6, 2024

by Stacey Jones

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Determining the optimal number of clusters in a data set is a basic problem in partitioned clustering (such as k-means clustering), which requires the user...

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The development tools

Hupu forum data analysis

January 6, 2024

by Tammy Hood

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Tecdat researchers analyzed all posts from each section of the January 2018 Tiger Walk forum, using data to explore user behavior and outline user preferences....

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The development tools

Ridge regression, Lasso regression, principal component regression in R language: Linear model selection and regularization

January 6, 2024

by Michelle Love

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In this paper, we will consider some alternative fitting methods for linear models, in addition to the usual ordinary least square method. These alternative methods...

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The development tools

R language clustering analysis: K-means and hierarchical clustering

January 6, 2024

by 龍美玲

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There are many clustering analysis algorithms, the classic ones are K-means and hierarchical clustering. K of k-means is the final cluster number, which needs to...

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The development tools

Excel example: one-way ANOVA statistical analysis

January 6, 2024

by Michael Murphy

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Excel provides many data analysis tools, can be accessed through the analysis of the data analysis > |. If you do not see this option,...

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The development tools

Little’s MCAR test for R language with different sample sizes

January 6, 2024

by Samantha Miller

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I ran a small simulation to test Little's MCAR test 1 with different sample sizes. I can study heteroscedasticity in linear regression. I was able...

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The back-end

SPADE algorithm

January 6, 2024

by Joanne Jackson

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SPADE is an early and well-known algorithm in sequence mining, which provides a set of solutions for a series of pain points of sequence mining...

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The development tools

Application of data mining algorithm in risk identification and prevention and control of property equipment and facilities management

January 6, 2024

by Nakul Mammen

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http://tecdat. Property engineering shoulders the responsibility of maintaining the normal operation of all kinds of facilities and equipment of the project, ensuring the normal life...

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The development tools

R language hidden Markov HMM model example

January 6, 2024

by Samantha Cragg

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Recently, we developed a solution using a hidden Markov model and were asked to explain the solution. HMM is used to model data sequences, whether...

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The development tools

Application of data mining algorithm in risk identification and prevention and control of property equipment and facilities management

January 6, 2024

by Abram Chad

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http://tecdat. Property engineering shoulders the responsibility of maintaining the normal operation of all kinds of facilities and equipment of the project, ensuring the normal life...

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The development tools

[Big Data Tribes] Text mining of product reviews based on LDA topic model clustering

January 5, 2024

by Mary Ward-MacPherson

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Home appliance industry and consumer upgrades quietly unfolded. This change in the market so that consumer expectations of household applian...

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The development tools

An empirical study on time series estimation of time-varying VAR model using R language

January 5, 2024

by Alexander Miller

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Mood_data < -as.time_data contains information about the timestamp of each measurement. This information is required for data preprocessing. 1 13/08/12 226 1 08:58 08:58:56 09:00:15...

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The development tools

R language based on temperature hierarchical clustering of cities, KMEAN clustering, principal component analysis and Voronoi diagram visualization

January 5, 2024

by Catherine Wells

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To illustrate the hierarchical clustering technique and the K-means, I used the urban temperature data set, which includes monthly mean temperatures for several cities. Here,...

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The development tools

Ggmap Spatial visualization of vehicle collision – Street map thermal map

January 5, 2024

by 徐冠霖

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In this article, I will create a town-level heat map of motor vehicle collisions in New York City. Data from New York City. In particular,...

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Artificial intelligence (ai)

Rio side tecdat | R language visualize: ggplot2 alluvial/sankey sankey diagram analysis university admissions, Titanic survivors data

January 5, 2024

by Aayush Borra

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The naming scheme and the basic components of the alluvial/sankey diagram (axis, alluvial layer, flow) are defined. The identified alluvial/sankey graph data structures are described....

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Artificial intelligence (ai)

Rio side tecdat | Python, random forests, naive bayesian decision trees, KNN (K nearest neighbors) classification analysis bank new activity mining potential borrowers

January 5, 2024

by Justine Twidle

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Project Background: The main profitable business of the bank depends on loans, and most of these customers are responsible customers with different sizes of deposits...

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The development tools

R language association rule model (Apriori algorithm) mining transaction data and interaction visualization of grocery stores

January 5, 2024

by Aaron Cox

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Association rule mining is an unsupervised learning method that mines rules from transaction data. It helps to find relationships in the data set and items...

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The development tools

How to create a Hexagon matrix Heatmap visualization in R language

January 5, 2024

by Kimberly Frazier

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This is a hexagon heat map visualization program, the main use of knowledge RColorBrewer, Fields, that is, R in the visual drawing library. This paper...

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Artificial intelligence (ai)

Rio side tecdat | R language generalized additive (additive models (GAMs) and smooth visual function

January 5, 2024

by 黃怡安

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We use generalized additive models (GAMs) in our research work. The MGCV software package is an excellent set of software for specifying, fitting, and visualizing...

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The development tools

Regression model on Crimerate Report for R language

January 5, 2024

by Anna Wolfe

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We  attempts to explore the relationship between different demographic factors to crime rate, find out the important factors related to crim...

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Artificial intelligence (ai)

Rio side tecdat | R language neural network prediction of time series: multilayer perceptron (MLP) and extreme learning machine (ELM) data analysis report

January 5, 2024

by Matthew Hill

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Multi-layer Perceptron (MLP) and extreme learning Machine (ELM) are used for time series prediction. Note that training for large networks tends to be slow because...

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Artificial intelligence (ai)

“BIFROST” data set search engine

January 5, 2024

by Jivika Grewal

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Data is the blood of deep learning, and data set search tools make it easier to find data. Data is the blood of deep learning....

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The development tools

[Big Data Tribe] (Data Mining) How to use big data to analyze user abnormal behavior

January 5, 2024

by Jose Martinez

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"Today we're seeing an explosion of data: social media data, systems data, CRM data, a lot of web data. In most cases, however, the data...

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Artificial intelligence (ai)

Rio side tecdat | R language Metropolis Hastings sampling and bayes Poisson regression Poisson model

January 5, 2024

by 鄧美琪

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In this article, I want to show you how to sample from a Bayesian Poisson regression model using R's Metropolis sampling. Metropolis-hastings sampling algorithm is...

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