问题描述
我有一个10 GB的.dta Stata文件，我正在尝试将其读入64位R 3.3.1.我正在使用具有约130 GB RAM(4 TB HD)的虚拟机，.dta文件大约有300万行，介于400到800个变量之间.
I have a 10 GB .dta Stata file and I am trying to read it into 64-bit R 3.3.1. I am working on a virtual machine with about 130 GB of RAM (4 TB HD) and the .dta file is about 3 million rows and somewhere between 400 and 800 variables.
我知道data.table()是读取.txt和.csv文件的最快方法，但是是否有人建议将较大的.dta文件读取到R中?将文件作为.dta文件读入Stata大约需要20-30秒，尽管我需要在打开文件之前设置最大工作内存(我将最大内存设置为100 GB).
I know data.table() is the fastest way to read in .txt and .csv files, but does anyone have a recommendation for reading largeish .dta files into R? Reading the file into Stata as a .dta file requires about 20-30 seconds, although I need to set my working memory max prior to opening the file (I set the max at 100 GB).
我还没有尝试在Stata中导入.csv，但是我希望避免与Stata接触文件.通过找到了解决方案，使用memisc将stata .dta文件导入到其中R ，但这是假设RAM不足.就我而言，我应该有足够的RAM来处理文件.
I have not tried importing to .csv in Stata, but I hope to avoid touching the file with Stata. A solution is found via Using memisc to import stata .dta file into R but this assumes RAM is scarce. In my case, I should have sufficient RAM to work with the file.
推荐答案
在R中加载大型Stata数据集的最快方法是使用readstata13包.我已经比较了大型数据集 在本文中 ，结果反复表明，readstata13是读取R中Stata数据集最快的可用软件包.
The fastest way to load a large Stata dataset in R is using the readstata13 package. I have compared the performance of foreign, readstata13, and haven packages on a large dataset in this post and the results repeatedly showed that readstata13 is the fastest available package for reading Stata dataset in R.
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