R - Vary by Row the Rounding of Digits Produced by knitr::kable

Question

I am trying to produce a markdown table using knitr::kable where the rounding of digits varies by rows. For example, suppose I have the following data.frame:

exa         


        

Answer 1

As pointed out by @user20650, one solution consists in converting the format of the entries in your dataframe in R before passing the data to knitr. It could be done like this:

example.df <- rbind(formatC(as.numeric(example.df[1,]),format="f",digits=2),
                    formatC(as.numeric(example.df[2,]),format="d"))
colnames(example.df) <- c("a","b")

This gives the following output:

> kable(example.df, align="r")

|    a|    b|
|----:|----:|
| 0.12| 0.57|
| 2000| 3000|