#
# Unit 8 - Data frames 
#
# Writing a data frame into a .csv file 
#

# Let us write this data frame into a .csv file
myDF <- data.frame(ID = c(1, 2, 3), 
                   GENDER = c("M", "F", "F"), 
                   AGE = c(27, 43, 23))
print(myDF)

# first wetting the working directory 
setwd("c:/R")

# Unsurprisingly, not read.csv but ...: 
write.csv(myDF, file = "students.csv")

myDF2 <- read.csv("students.csv")
print(myDF2)


# In the new file, the row labels appear. 
# To avoid adding them: 
write.csv(myDF, file = "students.csv", row.names = FALSE) 
myDF2 <- read.csv("students.csv")
print(myDF2)