1. Importing Files in R
Codes are in Blue.
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2. Importing files
• To import different types of files in R, we must install and load
a foreign package. So, first you install and load foreign
package into R console window
• library(foreign)
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3. Excel File (XLS file)
• library(gdata) # load the gdata package
• help(read.xls) # documentation
• mydata = read.xls("mydata.xls") # read from first sheet
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4. Excel File (XLSX file)
• We have to first install the packages XLSX and XLSXJARS to
import XLSX file to R
Example Code:
• library(xlsx)
• library(xlsxjars)
• data1<-read.xlsx(“D:data1.xlsx”,1)
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5. CSV File
• One good trick to import CSV file
• file=read.csv(file.choose())
• You can directly import file using browse.
• Syntax:
read.csv(file, header = TRUE, sep = ",", quote=""", dec=".", fill
= TRUE, comment.char="", ...)
• mydata = read.csv("mydata.csv")
# read csv file
• mydata # print data frame
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6. SPSS FILE
• SPSS can be opened with the read.spss function from the
foreign package
• library(foreign) # load the foreign package
• help(read.spss) # documentation
• mydata=read.spss("myfile", to.data.frame=TRUE)
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7. Table File or TXT File
• mydata = read.table("mydata.txt") # read text file
• mydata # print data frame
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8. Package Selection
• It is always good to check the PDF file of the package and in
the packages PDF file check the dependencies of the Package
with other packages so that we can easily know which
packages will be required to call.
• Some commonly used packages
• Foreign- to import file
• Gdata- to import XLS file
• Xlsx, xlsxjars- to import XLSX file
• Attach()- to attach file before doing Regression.
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9. THANK YOU.
Reference: http://cran.r-project.org/
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