Add a new column or variable to a table in R

Add a new column or variable to a table in R

# In R, rows are called observations and columns are called variables

We have a table below called tabletrains with four variables and we want to add another variable/column called "distance"

tabletrains

TrainNo	From	To	DateofJourney
12863	HWH	YPR	21-Nov-15
12245	HWH	YPR	21-Nov-15
12378	NJP	SDAH	20-Nov-15
52544	DJ	KGN	18-Nov-15
13149	BWN	NJP	15-Nov-15
12864	KJM	HWH	13-Nov-15
12864	KJM	HWH	10-Nov-15
12640	KJM	MAS	4-Nov-15
12840	MAS	HWH	4-Nov-15
12246	YPR	HWH	16-Aug-15

Steps:

install.packages("dplyr") # hit Ctrl + Enter

library(dplyr)                   # hit Ctrl + Enter

# once the package in loaded,

tabletrains <- tabletrains %>%

                      mutate("distance") # Select the code and hit Ctrl + Enter

# Check results

head(tabletrains)

names(tabletrains)

# If you want to assign a value to distance e.g., distance = 1000 km then

tabletrains <- tabletrains %>%

                      mutate(distance = 1000) # Select the code and hit Ctrl + Enter

# Check results

head(tabletrains)