Elaine-AL

#From https://stackoverflow.com/questions/1401904/painless-way-to-install-a-new-version-of-r

# Run in the old version of R (or via RStudio)
setwd("C:/Temp/") 
packages <- installed.packages()[,"Package"] 
save(packages, file="Rpackages") 

# INSTALL NEW R VERSION
if(!require(installr)) { install.packages("installr"); require(installr)} #load / install+load installr
# See here for more on installr: https://www.r-statistics.com/2013/03/updating-r-from-r-on-windows-using-the-installr-package/  

Elaine-AL

start_date = "2018/12/5"
end_date = "2019/7/27"

data.frame(start = seq.Date(from = floor_date(as.Date("2018/12/3"), "month"), 
                            to = floor_date(as.Date("2019/7/26"), "month"), 
                            by = "month")
           )
           
# Here are the results!!
#   start

Elaine-AL

open_file = open("AppleStore.csv")
from csv import reader
read_file = reader(open_file)
apps_dataset = list(read_file)

rating_sum = 0

for each_row in apps_dataset[1: ]:
    rating = float(each_row[7])
    rating_sum += rating