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   Foundation R培訓

Basic overview of R and R Studio
R overview
R Studio Environment Windows
Script Editor Window
Data Environment
Console
Plots/Help/Packages
Working with Data
Introduction to vectors and matrices (data.frame)
Different types of variables
Numeric, Integer, factor etc
Changing variable types
Importing data using R Studio menu functions
Removing variables ls() command
Creating variables at the console prompt – single, vector, data frame
Naming vectors and matrices
Head and tail commands
Introduction to dim, length and class
Command line import (reading .csv and tab delimited .txt files)
Attaching and detaching data (advantages vs data.frame$)
Merging data using cbind and rbind
Exploratory Data Analysis
Summarising data
Summary command on both vectors and data frames
Sub-setting data using square brackets
summarising and creating new variables
Table and summary commands
Summary statistic commands
Mean
Median
Standard Deviation
Variance
Count & frequencies
Min & Max,
Quartiles
Percentiles
Correlation
Exporting data
Write table .txt
Write to a .csv file
R Workspace
Concept of Working Directories and Projects (menu driven and code – setwd())
Introduction to R scripts
Creating R Scripts
Saving scripts
Workspace images
Concepts of packages
Installing packages
Loading packages into memory
Plotting data (using standard default R plot command and ggplot2 package)
Bar Charts and Histograms
Boxplots
Line charts / time series
Scatter plots
Stem and leaf
Mosaic
Modifying plots
Titles
Legends
Axis
Plot Area
Exporting a plot to a third party application