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Package ‘rio’
May1,2016
Type Package
Title ASwiss-ArmyKnifeforDataI/O
Version 0.4.0
Date 2016-05-01
Maintainer ThomasJ.Leeper<thosjleeper@gmail.com>
Description Streamlineddataimportandexportbymakingassumptionsthattheuserisprobablywill-
ingtomake:'import()'and'export()'determinethedatastructurefromthefileextension,reason-
abledefaultsareusedfordataimportandexport(e.g.,'stringsAsFactors=FALSE'),web-
basedimportisnativelysupported(includingfromSSL/HTTPS),compressedfilescanbereaddi-
rectlywithoutexplicitdecompression,andfastimportpackagesareusedwhereappropriate.
Depends R(>=2.15.0)
Imports tools,stats,utils,urltools,foreign,haven,openxlsx,
readODS,jsonlite,xml2,curl(>=0.6),data.table(>=1.9.5),
readxl,readr,yaml
Suggests datasets,bit64,testthat,knitr,magrittr
License GPL-2
VignetteBuilder knitr
NeedsCompilation no
Author JasonBecker[ctb],
Chung-hongChan[aut],
GeoffreyCHChan[ctb],
ThomasJ.Leeper[aut,cre],
ChristopherGandrud[ctb],
AndrewMacDonald[ctb],
IstaZahn[ctb]
Repository CRAN
Date/Publication 2016-05-0118:32:17
Rtopicsdocumented:
convert. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1
Converting pdf to searchable text format - search text inside PDF file in C#.net, ASP.NET, MVC, Ajax, WinForms, WPF
Learn how to search text in PDF document and obtain text content and location information
pdf search and replace text; search text in pdf image
Converting pdf to searchable text format - VB.NET PDF Text Search Library: search text inside PDF file in vb.net, ASP.NET, MVC, Ajax, WinForms, WPF
Learn How to Search Text in PDF Document and Obtain Text Content and Location Information in VB.NET application
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2
convert
export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
gather_attrs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
import . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
rio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Index
10
convert
Convertfromonefileformattoanother
Description
Thisfunctionconstructsadataframefromadatafileusingcodeimportandusesexporttowrite
thedatatodiskintheformatindicatedbythefileextension.
Usage
convert(in_file, out_file, in_opts = list(), out_opts = list())
Arguments
in_file
acharacterstringnaminganinputfile.
out_file
acharacterstringnaminganoutputfile.
in_opts
anamedlistofoptionstobepassedtoimport
out_opts
anamedlistofoptionstobepassedtoexport
Value
Thenameoftheoutputfile(invisibly).
SeeAlso
Luca Bragliahas createda Shinyappcalledriowebthatprovides accesstothefileconversion
featuresofriothroughawebbrowser.TheappisfeaturedintheRStudioShinyGallery.
Examples
# create a file to convert
export(iris, "iris.dta")
# convert Stata to CSV and open converted file
convert("iris.dta", "iris.csv")
head(import("iris.csv"))
# correct an erroneous file format
export(iris, "iris.csv", format = "tsv")
convert("iris.csv", "iris.csv", in_opts = list(format = "tsv"))
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export
3
# convert serialized R data.frame to JSON
export(iris, "iris.rds")
convert("iris.rds", "iris.json")
# cleanup
unlink("iris.csv")
unlink("iris.dta")
unlink("iris.rds")
unlink("iris.json")
## Not run:
# convert fromthe command line:
Rscript -e "rio::convert(iris.dta, iris.csv)"
## End(Not run)
export
Export
Description
Writedata.frametoafile
Usage
export(x, file, format, ...)
Arguments
x
Adataframeormatrixtobewrittenintoafile.
file
Acharacterstringnamingafile.Mustspecifyfileand/orformat.
format
Anoptionalcharacterstringcontainingthefileformat, whichcanbeusedto
overridetheformatinferredfromfileor,inlieuofspecifyingfile,afilewith
thesymbolnameofxandthespecifiedfileextensionwillbecreated. Must
specifyfileand/orformat. Shortcutsinclude:“,”(forcomma-separatedval-
ues),“;”(forsemicolon-separatedvalues),“|”(forpipe-separatedvalues),and
“dump”fordump.
...
Additionalargumentsfortheunderlyingexportfunctions.
Details
Thisfunctionexportsadataframeormatrixintoafilewithfileformatbasedonthefileextension
(orthemanuallyspecifiedformat,ifformatisspecified).
Theoutputfilecanbetoacompresseddirectory,simplybyaddinganappropriateadditionalexten-
sionttothefileargument,suchas:“iris.csv.tar”,“iris.csv.zip”,or“iris.csv.gz”.
exportsupportsmanyfileformats.Seethedocumentationfortheunderlyingexportfunctionsfor
optionalargumentsthatcanbepassedvia...
VB.NET Image: Robust OCR Recognition SDK for VB.NET, .NET Image
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VB.NET PDF Convert to HTML SDK: Convert PDF to html files in vb.
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4
export
• Tab-separateddata(.tsv),usingwrite.tablewithrow.names = FALSE.
• Comma-separateddata(.csv),usingwrite.csvwithrow.names = FALSE.
• CSVY(CSVwithaYAMLmetadataheader)usingread.csvwithrow.names = FALSE
andstringsAsFactors = FALSE(or,iffread = TRUE,fread). TheYAMLheaderlines
areprecededbyRcommentsymbols(\#)bydefault; thiscanbeturnedoffbypassinga
comment_header = FALSEargumenttoexport.
• Pipe-separateddata(.psv),usingwrite.tablewithsep = |androw.names = FALSE.
• Fixed-widthformatdata(.fwf),usingwrite.tablewithrow.names=FALSE,quote=FALSE,
andcol.names = FALSE
• SerializedRobjects(.rds),usingsaveRDS
• SavedRobjects(.RData),usingsave
• JSON(.json),usingtoJSON
• YAML(.yml),usingas.yaml
• Stata(.dta),usingwrite_dta
• SPSS(.sav),usingwrite_sav
• "XBASE"databasefiles(.dbf),usingwrite.dbf
• WekaAttribute-RelationFileFormat(.arff),usingwrite.arff
• Rsyntaxobject(.R),usingdput(bydefault)ordump(ifformat = dump
• Excel(.xlsx),usingwrite.xlsx
• XML(.xml),usingacustommethodtocreateasimpleXMLtree
• HTML(.html),usingacustommethodtocreateasingle-tableHTMLfile
• Clipboardexport(onWindowsandMacOS),usingwrite.tablewithrow.names = FALSE
Value
Thenameoftheoutputfileasacharacterstring(invisibly).
Examples
# specify onlyfile argument
export(iris, "iris.csv")
# specify onlyformat argument
"iris.dta"
export(iris, format = "stata")
"iris.dta"
# specify file and format to override default format
export(iris, file = "iris.txt", format = "csv")
# export to JSON
export(iris, "iris.json")
# pass arguments to underlying export function
export(iris, "iris.csv", col.names = FALSE)
VB.NET PDF Convert to Word SDK: Convert PDF to Word library in vb.
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how to make pdf text searchable; search text in multiple pdf
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NET control for batch converting text formats to editable & searchable PDF document. Sample code for text to PDF converting in C# programming .
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extensions
5
# write data to .R syntax file and append additional data
export(iris, file = "data.R", format = "dump")
export(mtcars,file = "data.R", format = "dump", append =TRUE)
source("data.R", echo = TRUE)
# write data to a zip-compressed CSV
export(iris, "iris.csv.zip")
# cleanup
unlink("iris.csv")
unlink("iris.dta")
unlink("iris.json")
unlink("data.R")
unlink("iris.csv.zip")
extensions
rioExtensions
Description
WritingImport/ExportExtensionsforrio
Usage
.import(file, ...)
.export(file, x, ...)
Arguments
file
Acharacterstringnamingafile.
x
Adataframeormatrixtobewrittenintoafile.
...
Additionalargumentspassedtomethods.
Details
rioimplementsformat-specificS3methodsforeachtypeoffilethatcanbeimportedfromorex-
portedto.ThishappensviainternalS3generics,.importand.export.Itispossibletowritenew
methodslikewithanyS3generic(e.g.,print).
Asanexample, .import.rio_csvimportsfromacomma-separatedvaluesfile. Ifyouwantto
produceamethodforanewfiletypewithextension“myfile”,yousimplyhavetocreateafunc-
tioncalled.import.rio_myfilethatimplementsaformat-specificimportingroutineandreturns
adata.frame. riowillautomaticallyrecognizenewS3methods,sothatyoucanthenimportyour
fileusing:import("file.myfile").
Asgeneralguidance,ifanimportmethodcreatesmanyattributes,theseattributesshouldbestored
—tothe extentpossible— invariable-levelattributes fields. Thesecanbe“gathered”tothe
data.framelevelbytheuserviagather_attrs.
VB.NET Word: .NET Word to SVG Converter Control; Convert Word to
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pdf searchable text; search a pdf file for text
6
gather_attrs
Value
For.import,anRdata.frame.For.export,file,invisibly.
SeeAlso
import,export
gather_attrs
Gatherattributesfromdata.framevariables
Description
Thisfunctionmovesvariable-levelattributestothedata.framelevel
Usage
gather_attrs(x)
Arguments
x
Adata.frame.
Details
importattemptstostandardizethereturnvaluefromthevariousimportfunctionstotheextentpos-
sible,thusprovidingauniformdatastructureregardlessofwhatimportpackageorfunctionisused.
Itachievesthisbystoringanyoptionalvariable-relatedattributesatthevariablelevel(i.e.,anat-
tributeformtcars$mpgisstoredinattributes(mtcars$mpg)ratherthanattributes(mtcars)).
gather_attrsmovesthesetothedata.frame-level(i.e.,inattributes(mtcars)).
Value
Adata.frame.
SeeAlso
import
Examples
e <- import("http://www.stata-press.com/data/r13/auto.dta")
str(e)
g <- gather_attrs(e)
str(attributes(e))
str(g)
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import
7
import
Import
Description
Readdata.framefromafile
Usage
import(file, format, setclass, which, ...)
Arguments
file
Acharacterstringnamingafile,URL,orsingle-file.zipor.tararchive.
format
Anoptionalcharacterstringcodeoffileformat,whichcanbeusedtooverride
theformatinferredfromfile.Shortcutsinclude:“,”(forcomma-separatedval-
ues),“;”(forsemicolon-separatedvalues),and“|”(forpipe-separatedvalues).
setclass
Anoptionalcharactervectorspecifyingoneormoreclassestosetontheimport.
Bydefault, allthereturnobjectisalwaysa“data.frame”. Reasonablevalues
forthismightbe“tbl_df”(ifusingdplyr)or“data.table”(ifusingdata.table).
Warningswillbeproducedifaclassisusedfromapackagethatisnotloaded
and/oravailable.
which
Iffileisacompresseddirectory,whichcanbeeitheracharacterstringspecify-
ingafilenameoranintegerspecifyingwhichfile(inlocalesortorder)toextract
fromthecompresseddirectory.Ignoredotherwise.Acharacterstringvaluewill
beusedasaregularexpression,suchthattheextractedfileisthefirstmatchof
theregularexpressionagainstthefilenamesinthearchive.
...
Additionalargumentspassedtotheunderlyingimportfunctions. Forexample,
thiscancontrolcolumnclassesfordelimitedfiletypes, orcontroltheuseof
havenforStataandSPSSorreadxlforExcel(.xlsx)format.Seedetailsbelow.
Details
Thisfunctionimportsadataframeormatrixfromadatafilewiththefileformatbasedonthefile
extension(orthemanuallyspecifiedformat,ifformatisspecified).
importsupportsthefollowingfileformats:
• Tab-separateddata(.tsv),usingread.tablewithrow.names=FALSEandstringsAsFactors=FALSE
(or,iffread = TRUE,fread)
• Comma-separateddata(.csv),usingread.csvwithrow.names=FALSEandstringsAsFactors=FALSE
(or,iffread = TRUE,fread)
• CSVY(CSVwithaYAMLmetadataheader)usingread.csvwithrow.names = FALSEand
stringsAsFactors = FALSE(or,iffread = TRUE,fread). Note: theYAMLheadercan
be“raw”orcommentedwithhashsymbolsatthebeginnningofeachline. Thelatteristhe
defaultformatwhenusingexporttowritetoCSVY.
8
import
• Pipe-separateddata(.psv),usingread.tablewithsep = |,row.names = FALSE,and
stringsAsFactors = FALSE(or,iffread = TRUE,fread)
• Fixed-widthformatdata(.fwf),usingafasterversionofread.fwfthatrequiresawidths
argumentandbydefaultinriohasstringsAsFactors = FALSE.Ifreadr = TRUE,import
willbeperformedusingread_fwf,wherewidthsshouldbe:NULL,avectorofcolumnwidths,
ortheoutputoffwf_empty,fwf_widths,orfwf_positions.
• SerializedRobjects(.rds),usingreadRDS
• SavedRobjects(.RData),usingloadforsingle-object.Rdatafiles
• JSON(.json),usingfromJSON
• YAML(.yml),usingyaml.load
• Stata(.dta),usingread_dta.Ifhaven = FALSE,read.dtacanbeused.
• SPSSandSPSSportable(.savand.por),usingread_savandread_por.Ifhaven = FALSE,
read.spsscanbeusedfor.savfiles.
• "XBASE"databasefiles(.dbf),usingread.dbf
• WekaAttribute-RelationFileFormat(.arff),usingread.arff
• Rsyntaxobject(.R),usingdget
• Excel(.xlsand.xlsx),usingread_excel.Ifreadxl = FALSE,read.xlsxcanbeused.
• SAS(.sas7bdat)andSASXPORT(.xpt),usingread_sasandread.xport.
• Minitab(.mtp),usingread.mtp
• Epiinfo(.rec),usingread.epiinfo
• Systat(.syd),usingread.systat
• DataInterchangeFormat(.dif),usingread.DIF
• OpenDocumentSpreadsheet(.ods),usingread.ods
• ShallowXMLdocuments(.xml). ThedatastructurewillonlybereadcorrectlyiftheXML
filecanbeconvertedtoalistviaas_list.
• Single-tableHTMLdocuments(.html). Thedatastructurewillonlybereadcorrectlyifthe
HTMLfilecanbereadwithread_htmlandconvertedtoalistviaas_list.
• Clipboardimport(onWindowsandMacOS),usingread.tablewithrow.names = FALSE
• Fortrandata(norecognizedextension),usingread.fortran
• GoogleSheets,asComma-separateddata(.csv)
importattemptstostandardizethereturnvaluefromthevariousimportfunctionstotheextentpos-
sible,thusprovidingauniformdatastructureregardlessofwhatimportpackageorfunctionisused.
Itachievesthisbystoringanyoptionalvariable-relatedattributesatthevariablelevel(i.e.,anat-
tributeformtcars$mpgisstoredinattributes(mtcars$mpg)ratherthanattributes(mtcars)).
Ifyouwouldprefertheseattributestobestoredatthedata.frame-level(i.e.,inattributes(mtcars)),
seegather_attrs.
Value
AnRdata.frame.Ifsetclassisused,thisdata.framemayhaveadditionalclassattributevalues.
rio
9
Note
Forcsvandtxtfileswithrownamesexportedfromexport,itmaybehelpfultospecifyrow.names
asthecolumnofthetablewhichcontainrownames.Seeexamplebelow.
SeeAlso
.import,gather_attrs
Examples
# create CSV to import
export(iris, "iris1.csv")
# specify format to override default format
export(iris, "iris.tsv", format = "csv")
stopifnot(identical(import("iris1.csv"), import("iris.tsv", format = "csv")))
# import CSV as a data.table
stopifnot(inherits(import("iris1.csv", setclass = "data.table"), "data.table"))
stopifnot(inherits(import("iris1.csv", setclass = "data.table"), "data.table"))
# pass arguments to underlying import function
iris1 <- import("iris1.csv")
identical(names(iris), names(iris1))
export(iris, "iris2.csv", col.names = FALSE)
iris2 <- import("iris2.csv")
identical(names(iris), names(iris2))
# set class for the response data.frame as "tbl_df" (fromdplyr)
stopifnot(inherits(import("iris1.csv", setclass = "tbl_df"), "tbl_df"))
# cleanup
unlink("iris.tsv")
unlink("iris1.csv")
unlink("iris2.csv")
rio
ASwiss-ArmyKnifeforDataI/O
Description
TheaimofrioistomakedatafileI/OinRaseasyaspossible. Theexportandimportserve
asaSwiss-armyknifeforpainlessdataI/Ofordatafromalmostanyfileformatbyinferringthe
datastructurefromthefileextension,nativelyreadingweb-baseddatasources,settingreasonable
defaultsforimportandexport,andrelyingonefficientdataimportandexportpackages.
Index
.export(extensions),5
.import,9
.import(extensions),5
as.yaml,4
as_list,8
convert,2
dget,8
dput,4
dump,3,4
export,2,3,6,7,9
extensions,5
fread,4,7,8
fromJSON,8
fwf_empty,8
fwf_positions,8
fwf_widths,8
gather_attrs,5,6,8,9
import,2,6,7
load,8
read.arff,8
read.csv,4,7
read.dbf,8
read.DIF,8
read.dta,8
read.epiinfo,8
read.fortran,8
read.fwf,8
read.mtp,8
read.ods,8
read.spss,8
read.systat,8
read.table,7,8
read.xlsx,8
read.xport,8
read_dta,8
read_excel,8
read_fwf,8
read_html,8
read_por,8
read_sas,8
read_sav,8
readRDS,8
rio,9
rio-package(rio),9
save,4
saveRDS,4
toJSON,4
write.arff,4
write.csv,4
write.dbf,4
write.table,4
write.xlsx,4
write_dta,4
write_sav,4
yaml.load,8
10
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