A new update of my sjPlot-package was just released on CRAN. Thanks to @c_schwemmer, it’s now possible to easily integrate the HTML-ouput of all table-functions into knitr-rmarkdown-documents.

Simpel Tables

In the past, to integrate table-output in knitr, you needed to set the argument no.output = TRUE and use the return-value $knitr:

`r sjt.df(efc, no.output=TRUE)$knitr`

If you also wanted to include the code to the function call, things were even more complicated. However, since sjPlot 2.3.1, you can use the table-functions like any other R-code-snippet:

```{r}
sjt.frq(efc$e42dep)
```

Grouped Tables

The same applies to the sjtab()-function, which is a „pipe“-wrapper for the sjPlot-table-functions. Here is an example how you can print multiple tables of grouped data frames in knitr. sjtab() calls sjt.xtab() (see argument fun = "xtab") and uses the first two arguments of the data frame as variables for the contingency table. Since the data frame is grouped (by gender and education), a table for each group is displayed. The group-characteristic is printed as table-caption. Note that the HTML-output here is truncated and limited to the first three tables only.

```{r}
library(dplyr)
library(sjPlot)
library(sjmisc)
data(efc)

efc %>% 
  group_by(e16sex, c172code) %>% 
  select(e42dep, n4pstu, e16sex, c172code) %>% 
  sjtab(fun = "xtab")
```

(… remaining table output truncated)

The knitr-integration works for all table-functions in sjPlot. You can find some examples over here.