Renders content as subscript in the final output. Use inside glue-string expressions in titles, footnotes, column labels, and cell values. Common in clinical statistics for chemical formulas (H₂O), statistical notation (beta-1), and indexed variables (x_i).
Value
An fr_markup object. When interpolated inside a glue string,
produces a sentinel token resolved at render time.
Rendering
In RTF output, subscript uses \sub (half the font size, lowered).
In future LaTeX output, it maps to \textsubscript{}. The subscript
text renders at roughly half the surrounding font size.
See also
fr_super() for superscript, fr_unicode() for arbitrary
Unicode characters.
Examples
# Chemical formula: H₂O
fr_col("H{fr_sub(2)}O", width = 1.0)
#> <fr_col> "H{fr_sub(2)}O" [1.00in, left]
# Statistical subscript: x_i
fr_col("x{fr_sub('i')}", width = 1.0)
#> <fr_col> "x{fr_sub('i')}" [1.00in, left]
# In a footnote:
spec <- tbl_demog |> fr_table()
spec |> fr_footnotes("{fr_sub('n')} = number of subjects with data")
#>
#> ── fr_spec: Table
#> Data: 28 rows x 6 columns
#> Page: landscape letter, 9pt Courier New
#> Header: valign=bottom
#> Footnotes (1):
#> 1. [left] "n = number of subjects with data"