# Title: Day 5 - Read and write data in R
# Student name 1:
# Student name 2:
# Comments (e.g, known bugs, questions you would like Dr. Cao to go through in the class, etc):


#1. Download "DATA133_example1.csv" from course website, and use read.table function to read all contents to variable "data1". 


#2. Load all contents of "DATA133_example1.csv" by reading from url directly (url and readLines function), and assign it to variable 'data2'. The link for the file is: https://www.cs.plu.edu/~caora/ds133/Materials/spring2019/Code/day5/DATA133_example1.csv 



#3. Check the class type for variable data1 and data2, are they the same? 


#4. Get the first 20 rows from 'data1', and assign it to variable 'mydata'


#5. Use write.table to write 'mydata' to a file named 'TemData.R'


#6. Use read.table to read 'TemData.R' to variable 'mydata2', and compare 'mydata' with 'mydata2', are they the same? 


#7. Repeat step 5 and 6, but use dput and dget, are they the same as read.table and write.table?


#8. Repeat step 5 and 6, but use dump and source function, think about the difference.