Can we modify the cell width in knitr and pandoc?

When generating an HTML file using knitr/pandoc to display multiple tables in a loop, how can you ensure that each table has the same total width despite having varying numbers of cells?

---
output:
  html_document:
theme: cosmo
---

{r results ="asis", echo=FALSE, warning=FALSE, kable}
library(knitr)
library(markdown)
library(pander)

for (i in 1:12) {
  df = data.frame(matrix(rnorm(i), nrow=2))
  cat(pandoc.table(df, split.table = Inf))
}

I attempted to use CSS to set a fixed width for the tables by setting it to "auto" and aligning them left, but I was unsuccessful. Any suggestions on how to achieve this?

htmlcssrknitr

Answer №1

The reason for this issue is the width: 100% setting in the original CSS file. To fix this, you can override it using a custom theme or additional CSS like the following simple snippet:

table {
  width: auto !important;
}

By adding the !important rule, you are prioritizing the new width value over the existing 100%. Save this code as a separate file, for example, custom.css and reference it in the YAML header of your document:

---
output:
  html_document:
    theme: cosmo
    css: custom.css
---

And by the way, there is no need to display the output of pander with cat command :)

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