R tutorial by examples:Data Frame

Data frame

A data frame is used for storing data. Suppose we have the following data:

Name	Age	Gender
James	27	M
Mark	30	M
Helan	23	F
Lora	29	F
Steve	30	M

Let create a data frame using the data given.

Name<- c("James", "Mark", "Helan","Lora","Steve")
Age <- c(27, 30, 23, 29, 30)
Gender <- c("M", "M", "F", "F", "M")
db <- data.frame(Name, Age, Gender)

View the data

db

##    Name Age Gender
## 1 James  27      M
## 2  Mark  30      M
## 3 Helan  23      F
## 4  Lora  29      F
## 5 Steve  30      M

Lists variables

names(db)

## [1] "Name"   "Age"    "Gender"

View all data in 3rd row

db[3, ] 

##    Name Age Gender
## 3 Helan  23      F

View data of 2nd and 3rd row and 1st and 2nd column

db[2:3, 1:2]

##    Name Age
## 2  Mark  30
## 3 Helan  23

View all columns of 2nd and 3rd row

db[2:3, ] 

##    Name Age Gender
## 2  Mark  30      M
## 3 Helan  23      F

Additional Readings

R Programming For Beginners Part 1– R Language Tutorial https://www.youtube.com/watch?v=DmX5TW473BA