R package condformat. Apply and visualize conditional formatting to data frames in R. It renders a data frame with cells formatted according to criteria defined by rules, using a syntax similar to ’ggplot2’. The table is printed either opening a web browser or within the ’RStudio’ viewer if available. The conditional formatting rules allow to highlight cells matching a condition or add a gradient background to a given column. This package supports both ’HTML’ and ’LaTeX’ outputs in ’knitr’ reports, and exporting to an ’xlsx’ file.