Import 'Stata' Data Files.
readstata13
Package to read and write all Stata file formats (version 17 and older) into a R data.frame. The dta file format versions 102 to 119 are supported.
The function read.dta from the foreign package imports only dta files from Stata versions <= 12. Due to the different structure and features of dta 117 files, we wrote a new file reader in Rcpp.
Additionally the package supports many features of the Stata dta format like label sets in different languages (?set.lang) or business calendars (?as.caldays).
Installation
The package is hosted on CRAN.
install.packages("readstata13")
Usage
library(readstata13)
dat <- read.dta13("path to file.dta")
save.dta13(dat, file="newfile.dta")
Development Version
To install the current release from github you need the platform specific build tools. On Windows a current installation of Rtools is necessary, while OS X users need to install Xcode.
# install.packages("devtools")
devtools::install_github("sjewo/readstata13", ref="0.10.0")
Older Versions of devtools require a username option:
install_github("readstata13", username="sjewo", ref="0.10.0")
To install the current development version from github:
devtools::install_github("sjewo/readstata13", ref="testing")
Changelog and Features
| Version | Changes |
|---|---|
| 0.10.1 | fix writing "NA", NA_character_ values |
| fix writing of STRLs in big endian systems | |
| 0.10.0 | fix for reading/writing of format 119 |
| fix sortlist attribute for dta format 119 | |
| fix compress option. In the past, unwanted conversions to integer type could occur. | |
| fix encoding issues in variable and data labels | |
| fix build on FreeBSD | |
| new feature: improved handling of time and date formats | |
| new feature: collect warnings from read.dta13 | |
| 0.9.2 | Fix Build on MacOS X |
| 0.9.1 | Allow reading only pre-selected variables |
| Experimental support for format 119 | |
| Improvements to partial reading. Idea by Kevin Jin | |
| Export of binary data from dta-files | |
| new function get.label.tables() to show all Stata label sets | |
| Fix check for duplicate labels and in set.lang() | |
| 0.9.0 | Generate unique factor labels to prevent errors in factor definition |
| check interrupt for long read. Patch by Giovanni Righi | |
| Updates to notes, roxygen and register | |
| Fixed size of character length. Bug reported by Yiming (Paul) Li | |
| Fix saving characters containing missings. Bug reported by Eivind H. Olsen | |
| Adjustments to convert.underscore. Patch by luke-m-olson | |
| Allow partial reading of selected rows | |
| 0.8.5 | Fix errors on big-endians systems |
| 0.8.4 | Fix valgrind errors. converting from dta.write to writestr |
| Fix for empty data label | |
| Make replace.strl default | |
| 0.8.3 | Restrict length of varnames to 32 chars for compatibility with Stata 14 |
| Add many function tests | |
| Avoid converting of double to floats while writing compressed files | |
| 0.8.2 | Save NA values in character vector as empty string |
| Convert.underscore=T will convert all non-literal characters to underscores | |
| Fix saving of Dates | |
| Save with convert.factors by default | |
| Test for NaN and inf values while writing missing values and replace with NA | |
| Remove message about saving factors | |
| 0.8.1 | Convert non-integer variables to factors (nonint.factors=T) |
| Handle large datasets | |
| Working with strL variables is now a lot faster | |
| <0.8.1 | Reading data files from disk or url and create a data.frame |
| Saving dta files to disk - most features of the dta file format are supported | |
| Assign variable names | |
| Read the new strL strings and save them as attribute | |
| Convert stata label to factors and save them as attribute | |
| Read some meta data (timestamp, dataset label, formats,...) | |
| Convert strings to system encoding | |
| Handle different NA values | |
| Handle multiple label languages | |
| Convert dates | |
| Reading business calendar files |
readstata13 and foreign
Most attributes of the resulting data.frame are largely similar to the data.frames produced by foreign. Since newer Stata files require some additional attributes, the results of all.equal() and identical() will be FALSE for data.frames read by foreign::read.dta and read.dta13(). Otherwise, the data.frames produced by both functions are identical.
library(foreign)
library(readstata13)
# with factors
r12 <- read.dta("http://www.stata-press.com/data/r12/auto.dta")
r13 <- read.dta13("http://www.stata-press.com/data/r13/auto.dta")
all.equal(r12, r13, check.attributes = FALSE)
# without factors
r12 <- read.dta("http://www.stata-press.com/data/r12/auto.dta",
convert.factors = FALSE)
r13 <- read.dta13("http://www.stata-press.com/data/r13/auto.dta",
convert.factors = FALSE)
all.equal(r12, r13, check.attributes = FALSE)
Authors
Marvin Garbuszus (JanMarvin) and Sebastian Jeworutzki (sjewo)
Licence
GPL2