Section 1 Review

• RStudio environment:

  • Console, Source
  • File, setwd(), getwd()
  • Environment, History, Plots
  • Packages, Help

• R Class, R Objects

• Types of R Class

  • Integer, Double, Logical, Character

• Vector

• Vector operations

• Testing: is.*

• Coercion: as.*

• Implicit, Explicit, Non-sensical coercion

• Missing values

• Operation with missing values

• R Functions

• R Help

• Factor: Categorical & Ordinal

• Factor Operations

• Matrix

• Array

• Dataframe

• List

• Table

• Read, Write, Save R objects

• Read, Write, Save data

• R housekeeping

• Operation on vector, matrix, array, data.frame

• Subsetting/Indexing on vector, matrix, array, data.frame, list

• Data management

  • Select Columns
  • Filter Rows
  • Arrange Columns
  • Rename Rows & Columns
  • Apply Functions

• Reshape data

• Combine data

  • Combine Rows
  • Combine Columns

• Merge data

• Functions

  • Structure
  • Arguments
  • Writing functions

• Control structure

  • if
  • for
  • while, next, break

• apply family

  • apply
  • tapply
  • lapply, sapply
  • split & apply