Marcos Vinicius - 9 months ago 73

LaTeX Question

I'm using the library

`stargazer`

`latex`

I need to change the decimal separator to comma (",") and the function

`stargazer()`

`summary = false`

Anyone knows how to overcome this problem?

`<<results='asis'>>=`

library(stargazer)

set.seed(0)

x = matrix(rnorm(3),nrow = 1)

y = matrix(rnorm(9),nrow = 3)

stargazer(x,summary=FALSE)

stargazer(x,summary=FALSE,decimal.mark = ",")

stargazer(y,summary=TRUE,decimal.mark = ",")

@

Table 2 always shows a extra space between the comma and the first decimal place. Table 3 shows good results

Answer

When inspecting the generated TEX it becomes clear that `stargazer`

does not add any spaces after the commas. The problem lies somewhere else:

The root of this problem is that LaTeX does not recognize `,`

as a decimal separator by default. Therefore, when in math mode, LaTeX adds a space after each `,`

. This problem is described here on TEX.SE and the solution is to include the `icomma`

package.

```
\documentclass{article}
\usepackage{icomma}
\begin{document}
<<results='asis', echo=FALSE, message = FALSE>>=
library(stargazer)
set.seed(0)
x = matrix(rnorm(3),nrow = 1)
y = matrix(rnorm(9),nrow = 3)
stargazer(x,summary=FALSE)
stargazer(x,summary=FALSE,decimal.mark = ",")
stargazer(y,summary=TRUE,decimal.mark = ",")
@
\end{document}
```

One question remains: Why was the problem not visible in Table 3 from the question? This is because `stargazer`

uses inconsistent math markup in the tables. The second cell in Table 2 contains `$$-$0,326$`

whereas row 2, last column of Table 3 contains `$-$0,006`

. In the first case, the number itself is in math mode, leading to the behavior described above. (And unfortunately, the `-`

is in text mode, leading to bad typography.) In the second case, the number is in text mode, where no extra space is added.

To overcome the issue with the badly formatted minus signs, I recommend using `xtable`

instead of `stargazer`

for the simple (non-summary) tables. Combined with a custom column type that sets the column in math mode, the result is:

```
\documentclass{article}
\usepackage{icomma}
\usepackage{tabularx}
\newcolumntype{R}{>{$}r<{$}} % like an "r" column but in math mode
\begin{document}
<<results='asis', echo=FALSE>>=
library(xtable)
set.seed(0)
x = matrix(rnorm(3),nrow = 1)
print.xtable(
xtable(x, caption = "", align = rep("R", 4)),
include.rownames = FALSE,
include.colnames = FALSE,
format.args = list(decimal.mark = ","),
caption.placement = "top")
@
\end{document}
```