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Thursday, September 11, 2025

Zhuo Yao, Ph.D.

Professional Website of Dr. Zhuo Yao
Zhuo Yao, Ph.D.
Professional Website of Dr. Zhuo Yao
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  • linux

    Install WordPress with Apache and Let’s Encrypt SSL on Ubuntu 22.04

    WordPress is one of the most popular content management systems on the internet. It is open-source CMS and works well with almost any web hosting…

    construction supervison 11/22/2022
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  • NotePad++

    Notepad++ add to every line

    https://stackoverflow.com/questions/11003761/notepad-add-to-every-line Follow these steps: To add a word, such as test, at the beginning of each line: To add a word, such as test, at…

    construction supervison 01/05/2022
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  • R

    RStudio Theme

    https://tmtheme-editor.herokuapp.com/#!/editor/theme/Friendship%20Bracelet

    construction supervison 11/26/2019
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  • R

    Exercise 1: Multinomial logit model

    https://cran.r-project.org/web/packages/mlogit/vignettes/e1mlogit.html Kenneth Train and Yves Croissant 2019-07-22 There are 900 observations with the following variables: Note that the attributes of the alternatives, namely, installation cost…

    construction supervison 11/08/2019
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  • R

    Random utility model and the multinomial logit model

    Random utility model The utility for alternative l is written as: Ul=Vl+ϵl where Vl is a function of some observable covariates and unknown parameters to…

    construction supervison 11/08/2019
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linux

CouchDB Installation

construction supervison 02/25/2015

Stable releases of http://couchdb.apache.org/ maintained and provided by the CouchDB project and community, based on the officially released tarballs. Installation should be straightforward, usual caveats…

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linux

How To Install and Use PostgreSQL on Ubuntu 12.04

construction supervison 02/25/2015

Install Postgres Before we install postgres, we should quick perform a quick update of the apt-get repository: apt-get update Once apt-get has updated go ahead…

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linux

PostgreSQL installation in Ubuntu 12.04

construction supervison 02/25/2015

PostgreSQL is a powerful and reliable object-relational database system. It’s a great alternative for MySQL. It is as easy to set up, performs better and offers…

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R

readWorksheet-methods {XLConnect}

construction supervison 02/22/2015

Reading data from worksheets Package: XLConnect Version: 0.2-7 Description Reads data from worksheets of a workbook. Usage ## S4 method for class ‘workbook,numeric’: readWorksheet((object,sheet,startRow,startCol,endRow,endCol,autofitRow,autofitCol, region,header,rownames,colTypes,forceConversion,dateTimeFormat,check.names,…

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Uncategorized

Importing multiple Excel files, each with multiple sheets, into R.

construction supervison 02/22/2015

Importing multiple Excel files, each with multiple sheets, into R. Excel is extremely popular as a tool for organizing data and it has fairly easy-to-use…

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R

readWorksheetFromFile Reading data from worksheets in an Excel file (wrapper function)

construction supervison 02/22/2015

Examples # multiregion xlsx file from demoFiles subfolder of # package XLConnect demoExcelFile <- system.file(“demoFiles/multiregion.xlsx”, package = “XLConnect”) # Read single area from first sheet…

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R

Read Excel files from R

construction supervison 02/22/2015

Many people still save their data into Microsoft Excel files. This is an unhappy choice for many reasons but many was already written about this…

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R

R Programming/Text Processing

construction supervison 02/22/2015

This page includes all the material you need to deal with strings in R. The section on regular expressions may be useful to understand the…

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linux

Rsync (Remote Sync): 10 Practical Examples of Rsync Command in Linux

construction supervison 02/20/2015

Rsync (Remote Sync) is a most commonly used command for copying and synchronizing files and directories remotely as well as locally in Linux/Unix systems. With…

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R

10 R packages which will master you in R Tool

construction supervison 02/17/2015

R can be more prickly and obscure than other languages like Python or Java. The good news is that there are tons of packages which…

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