Checking data

files and direcotires

This documentation talks mainly about working with R files.

To know the directory you are currently in:

getwd()

## [1] "D:/data"

To change directory

setwd("d:/data")

to check in some directory exists

if(!file.exists("data")){
  dir.create("data")
}

download a file

fileUrl<-"https://data.baltimorecity.gov/api/views/dz54-2aru/rows.csv?accessType=DOWNLOAD"
#download.file(fileUrl, destfile="./data/cameras.csv")
list.files("./data")

## [1] "cameras.csv"

make sure to record the date

dataDownload<-date()
dataDownload

## [1] "Tue Nov 04 14:00:42 2014"