CHAPTER ONE: DATA MANAGEMENT IN R

in this chapter, we will cover a number of functions, commands and packages using for data management in R.

Data Tpyes in R

There are six different data types in R including:

  • vectors
  • Matrices
  • Arrays
  • Data frames
  • Lists
  • Factors

Vectors

Vectors are the fundamental components for all data types in R. Based on the scale of measurements, they can be categorized in to six different components including.

  1. Character
  2. Ordered
  3. Factors
  4. Integer
  5. Numeric
  6. Logical

Example 1

x<- c(12,11.5,12.5,13.5,21,23,24,21,25,26)
plot (density(x))

hist(x)

boxplot(x)

Example 2

y<-c(T,T,T,T,F,F,F,F,T,F)
table(y)
## y
## FALSE  TRUE 
##     5     5
barplot(y)