Reading Data into R REVISED
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Reading data into
2012-10-05@HSPHKazuki Yoshida, M.D. MPH-CLE student
FREEDOMTO KNOW
REVISED
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n Introduction to R
n Reading Data into R (1)
Previously in this group
Group Website: http://rpubs.com/kaz_yos/useR_at_HSPH
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Menu
n Configuring RStudio
n Installing/Loading packages
n Reading text files in
n Reading excel files in
n (Reading other files in)
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Ingredients
n None n Install/Load packages
n read.____() functions
n <- (assignment)
Statistics Programming
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is the study of the collection, organization, analysis, interpretation,
and presentation of
datahttp://en.wikipedia.org/wiki/Statistics
http://mediacrushllc.com/2012/internet-statistics-2012/
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Supportedn .RData (native): load()
n .csv & text files: read.csv(), etc
n .xls/.xlsx: library(gdata) or library(xlsx)
n .sas7bdat: read.sas7bdat() via library(sas7bdat)
n .dta: read.dta via library(foreign)
n and more...http://cran.r-project.org/doc/manuals/R-data.html
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Create a folder for this study group
This will be your working directory.
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First configure Studio
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Open R Studio
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ConsolePlot
Workspace
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Tools-Options
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Restart RStudioafter cofiguration
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Working directory?
Folder your are working in
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CRANmirror
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Comprehensive
RArchive
Network
http://cran.r-project.org/web/packages/available_packages_by_date.html
You get additional
functionalities from here!
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Createa script
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Source
Console Plot
Workspace
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Install additional packages
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foreign sas7bdat XML
gdataxlsx
Install packages!
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Click to loadpackageslibrary(gdata)
programming way to load it
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Use text filesuch as csvif possible
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http://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20bI&product_isbn_issn=9780538733496
Download comma-separated and Excel
BONEDEN.DAT.txtBONEDEN.DAT.xls
Put them in folder
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For comma-, tab-, or space-separated text,
GUI is available
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Text
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bone <- read.csv(“BONEDEN.DAT.txt”)
name of a dataset herefile name here
function to read .csv files
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Excel next
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library(gdata)bone <- read.xls(“BONEDEN.DAT.xls”)
Use gdata package
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library(xlsx)bone <- read.xlsx(“BONEDEN.DAT.xls”, sheetIndex = 1)
Use xlsx package
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Always hit TABhttp://www.clickykeyboards.com/index.cfm/fa/
items.main/parentcat/10191/subcatid/0/id/179764
Never type all
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Always hit TABhttp://www.clickykeyboards.com/index.cfm/fa/
items.main/parentcat/10191/subcatid/0/id/179764
Never type all
F1 for help
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Follow on-site instructions
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library(foreign)bone <- read.xport(“BONEDEN.DAT.xpt”)
or
library(sas7bdat)bone <- read.sas7bdat(“BONEDEN.DAT.sas7bdat”)
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library(foreign)
bone <- read.dta(“BONEDEN.DAT.dta”)
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http://www.drugs.com/top200_2003.html
HTML table!
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library(XML)
drug2003 <- readHTMLTable("http://www.drugs.com/top200_2003.html", which = 2, skip.rows = 1)
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Menu
n Configuring RStudio
n Installing/Loading packages
n Reading text files in
n Reading excel files in
n (Reading other files in)
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Ingredients
n None n Install/Load packages
n read.____() functions
n <- (assignment)
Statistics Programming
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