Basic Use of Statamarkdown

Doug Hemken

Nov 2020

This discussion assumes you already have a basic understanding of Markdown for document formatting, Rmarkdown to include executable code in a document, and Stata to write the code.

First attach the Statamarkdown library

Your first code chunk will look something like this:

```{r library}
library(Statamarkdown)
```

This will either report that Stata was found, or that you need to specify it's location yourself.

library(Statamarkdown)
## Stata found at C:/Program Files/Stata16/StataSE-64.exe
## Found a 'sysprofile.do'
## The 'stata' engine is ready to use.

You can hide all of this so it does not appear in your final document by using the include=FALSE chunk options.

If Stata was not found

You will need to specify this yourself, as an alternative line in the "library" code block.

stataexe <- "C:/Program Files/Stata16/StataSE-64.exe"

If you do not know where to find you Stata executable (app), open Stata and issue the command sysdir. The line labeled STATA: is the folder where your Stata executable is located. You can browse there with your computer's file explorer to see the actual file name of the Stata executable, which varies by operating system, Stata version, and Stata flavor.

Then you should set the Stata executable path as a default chunk option.

knitr::opts_chunk$set(engine.path = list(stata = stataexe))

Then set up Stata code chunks.

A simple code chunk in Rmarkdown might look like:

```{stata example}
sysuse auto
summarize
```

And in your document this would produce:

sysuse auto
summarize
(1978 Automobile Data)

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        make |          0
       price |         74    6165.257    2949.496       3291      15906
         mpg |         74     21.2973    5.785503         12         41
       rep78 |         69    3.405797    .9899323          1          5
    headroom |         74    2.993243    .8459948        1.5          5
-------------+---------------------------------------------------------
       trunk |         74    13.75676    4.277404          5         23
      weight |         74    3019.459    777.1936       1760       4840
      length |         74    187.9324    22.26634        142        233
        turn |         74    39.64865    4.399354         31         51
displacement |         74    197.2973    91.83722         79        425
-------------+---------------------------------------------------------
  gear_ratio |         74    3.014865    .4562871       2.19       3.89
     foreign |         74    .2972973    .4601885          0          1