Chapter 7 Tables

7.1 Markdown table generator

If you’re making a new table from scratch then the Markdown Table Generator (https://www.tablesgenerator.com/markdown_tables) is a handy tool.

7.2 Table syntax

Tables are a bit more simple in markdown than in latex. I haven’t played around with complex tables much, but it’s straightforward to make a basic one.

Example table:

Table: (\#tab:planck-model) Base $\Lambda$CDM cosmological parameters from @Planck18. 

| Parameter | Best fit value     | Uncertainty |
|:--------------------|----------:|----------:|
| $\Omega_{b}h^2$ | 0.02233 | 0.00015 |
| $\Omega_{c}h^2$ | 0.1198 | 0.0012 |
| $\Omega_{m}h^2$ | 0.1428 | 0.0011 |
| $H_0$ | 67.37 | 0.54 |
| $\Omega_{m}$ | 0.3147 | 0.0074 |
| Age (Gyr) | 13.801 | 0.024 | 
| $z_{re}$ | 7.64 |  0.74 | 
| 100$\theta_{*}$ | 1.04108 | 0.00031 |

Important things about tables:

  • Captions go at the top and should include the label definition.
  • Label syntax is Table: (\#tab:table-name)
  • Columns are delimited by |
  • Justification given by the colons and dashes in the line under the header row.
Table 7.1: Base \(\Lambda\)CDM cosmological parameters from Planck Collaboration (2018).
Parameter Best fit value Uncertainty
\(\Omega_{b}h^2\) 0.02233 0.00015
\(\Omega_{c}h^2\) 0.1198 0.0012
\(\Omega_{m}h^2\) 0.1428 0.0011
\(H_0\) 67.37 0.54
\(\Omega_{m}\) 0.3147 0.0074
Age (Gyr) 13.801 0.024
\(z_{re}\) 7.64 0.74
100\(\theta_{*}\) 1.04108 0.00031

7.3 Fancy tables

The kableExtra package is useful if you want to make fancier tables with things like grouped columns. The documentation is here (it’s a bit sparse…) but I’m including an example here to save you the time googling.

library(kableExtra)
## read the table in from a file
df <- read.csv("lj_table.csv", header = TRUE, row.names = "Element")
## changing the names of my column headings. R starts
## counting at 1
names(df)[1] <- paste("$10^{-21}$ J")
names(df)[2] <- paste("meV")
names(df)[3] <- paste("$10^{-10}$ m")
## fancy formatting
df %>%
    kbl(caption = "Lennerd-Jones potentials, apparently. Shamelessly stolen from Sloan's lecture notes.",
        align = c("l", "c", "c", "c")) %>%
    ## only a little table, so stopping it being the full
    ## width of the page
kable_styling(full_width = F) %>%
    ## Grouping some columns
add_header_above(c(Element = 1, `$\\epsilon$` = 2, `$\\sigma$` = 1,
    `$r_0$` = 1), align = c("l", "c", "c", "c"))
Table 7.2: Lennerd-Jones potentials, apparently. Shamelessly stolen from Sloan’s lecture notes.
Element
\(\epsilon\)
\(\sigma\)
\(r_0\)
\(10^{-21}\) J meV \(10^{-10}\) m Å
He 0.14 0.9 2.56 3.12
Ne 0.49 3.1 2.75 3.36
Ar 1.70 10.6 3.40 4.15

To get this to show your table, include the code above inside an r code chunk. The echo=FALSE part hides the code but still displays the result (which is probably what you want).

```
{r echo=FALSE}

## table code goes here

```

References

Planck Collaboration. 2018, arXiv:180706209, arXiv:1807.06209, https://arxiv.org/abs/1807.06209