web analytics
Skip to content
Sunday, June 15, 2025

Zhuo Yao, Ph.D.

Professional Website of Dr. Zhuo Yao
Zhuo Yao, Ph.D.
Professional Website of Dr. Zhuo Yao
  • About Me
  • Teaching
  • Research
  • Hornors
  • Service
  • Publications
  • Demos
  • Resources
  • Tips
    • Writing
    • Research
    • Spatial Panel Modeling
    • SSH
    • Visual Studio 2010
    • Statistics
    • Technology
    • VB.Net
    • VISUM
    • Web design
    • R
    • Conference Papers
    • Journal papers published
    • Database
    • Legislation
    • Policy
    • Presentations
    • Publications
    • Working papers
    • Inforgraphics
    • ArcGIS
    • Career
    • Climate Change
    • Computer VIsion
    • Foundamentals
    • Geo-processing
    • Image Processing
    • MS Office
    • Travel Demand Modeling

Category: R

R

rJava in RStudio, Windows, and library xlsx

calsalmon February 1, 2016

This post is intended for users attempting to use the XLSX package in the Windows version of RStudio. I am using RStudio 0.98, R 3.1.2,…

View More rJava in RStudio, Windows, and library xlsx
R

Working with XML Data in R

calsalmon January 28, 2016

Working with XML Data in R A common task for programmers these days is writing code to analyze data from various sources and output information…

View More Working with XML Data in R
R

Taking control of qualitative colors in ggplot2

calsalmon August 24, 2015

Optional getting started advice Ignore if you don’t need this bit of support. This is one in a series of tutorials in which we explore…

View More Taking control of qualitative colors in ggplot2
R

Introduction to ggthemes

calsalmon August 20, 2015

ggthemes Package Overview Some extra geoms, scales, and themes for ggplot, including: Geoms geom_rangeframe : Tufte’s range frame geom_tufteboxplot: Tufte’s box plot Themes theme_calc: a…

View More Introduction to ggthemes
R

Position scale, date

calsalmon August 14, 2015

Usage scale_x_date(…, expand = waiver(), breaks = pretty_breaks(), minor_breaks = waiver()) scale_y_date(…, expand = waiver(), breaks = pretty_breaks(), minor_breaks = waiver()) Arguments breaks A vector…

View More Position scale, date
R

R Time Data Types

calsalmon August 13, 2015

Contents Time and Date Variables Time Operations The time data types are broken out into a separate section from the introductory section on data types.…

View More R Time Data Types
R

Updating R from R (on Windows) – using the {installr} package

calsalmon August 12, 2015

Upgrading R on Windows is not easy. While the R FAQ offer guidelines, some users may prefer to simply run a command in order to…

View More Updating R from R (on Windows) – using the {installr} package
R

Using Loops with ggplot2

calsalmon July 30, 2015

http://reed.edu/data-at-reed/resources/R/loops_with_ggplot2.html library(stringr) library(reshape2) library(ggplot2) library(ggthemes) library(pander) # update this file path to point toward appropriate folders on your computer # folder where you want the…

View More Using Loops with ggplot2
R

Mutiple Dataframes within Lists from the start

calsalmon July 30, 2015

Lists from the start Again: Don’t ever create d1 d2 d3 in the first place, just create a list d with 3 elements. Reading multiple…

View More Mutiple Dataframes within Lists from the start
R

Dates and Times in R

calsalmon July 29, 2015

Dates and Times in R R provides several options for dealing with date and date/time data. The builtin as.Date function handles dates (without times); the…

View More Dates and Times in R

Posts pagination

Previous page Page 1 Page 2 Page 3 … Page 15 Next page

  • Install WordPress with Apache and Let’s Encrypt SSL on Ubuntu 22.04
  • Notepad++ add to every line
  • RStudio Theme
  • Exercise 1: Multinomial logit model
  • Random utility model and the multinomial logit model
Zhuo Yao, Ph.D. | Designed by: Theme Freesia | WordPress | © Copyright All right reserved