R - Conditional row highlighting in HTML table created using xtable or kable

Question

I\'m pretty much a beginner at programmatically formatting R output, but I\'ve got a basic understanding of knitr, xtable, Markdown, and Pandoc\'s

Answer 1

Here is a solution using Gmisc::htmlTable

set.seed(123)
df <- data.frame(id       = sample(1:100, 20, replace = TRUE),
                 inputval = sample(seq(0, 1, by=0.01), 20, replace = TRUE),
                 outcome  = sample(1:4, 20, replace = TRUE))

cols <- with(df, ifelse(outcome == 1, 'magenta', 'white'))

library(Gmisc)
htmlTable(as.matrix(df), altcol = cols, 
          rgroup = '', n.rgroup = rep(1, length(cols)))

EDIT

Since htmlTable has since been moved to the package, htmlTable, and is no longer in Gmisc >= 1.0, the new way to do this would be

library('htmlTable')
htmlTable(as.matrix(df), col.rgroup = cols)

which also gives:

and your markdown code would simply be

```{r, results='asis'}
htmlTable(as.matrix(df), altcol = cols, 
          rgroup = '', n.rgroup = rep(1, length(cols)))
```

And my .Rmd would look like:

---
output: 
  html_document:
    css: ~/knitr.css
---

```{r, results='asis', message=FALSE}
set.seed(123)
df <- data.frame(id       = sample(1:100, 20, replace = TRUE),
                 inputval = sample(seq(0, 1, by=0.01), 20, replace = TRUE),
                 outcome  = sample(1:4, 20, replace = TRUE))

cols <- with(df, ifelse(outcome == 1, 'magenta', 'white'))

library(Gmisc)
htmlTable(as.matrix(df), altcol = cols, 
          rgroup = '', n.rgroup = rep(1, length(cols)))
```