quantile(aval, probs = c(0.25, 0.4))Deriving Quantiles or Percentiles in R
Percentiles can be calculated in R using the quantile function. The function has the argument type which allows for nine different percentile definitions to be used. The default is type = 7, which uses a piecewise-linear estimate of the cumulative distribution function to find percentiles.
This is how the 25th and 40th percentiles of aval could be calculated using the default type.
NoteSession Info
─ Session info ───────────────────────────────────────────────────────────────
setting value
version R version 4.5.2 (2025-10-31)
os macOS Tahoe 26.3
system aarch64, darwin20
ui X11
language (EN)
collate en_US.UTF-8
ctype en_US.UTF-8
tz Europe/London
date 2026-02-23
pandoc 3.6.3 @ /Applications/Positron.app/Contents/Resources/app/quarto/bin/tools/aarch64/ (via rmarkdown)
quarto 1.8.27 @ /Applications/Positron.app/Contents/Resources/app/quarto/bin/quarto
─ Packages ───────────────────────────────────────────────────────────────────
! package * version date (UTC) lib source
P cli 3.6.5 2025-04-23 [?] RSPM
P digest 0.6.39 2025-11-19 [?] RSPM
P evaluate 1.0.5 2025-08-27 [?] RSPM
P fastmap 1.2.0 2024-05-15 [?] RSPM
P htmltools 0.5.9 2025-12-04 [?] RSPM
P htmlwidgets 1.6.4 2023-12-06 [?] RSPM
P jsonlite 2.0.0 2025-03-27 [?] RSPM
P knitr 1.51 2025-12-20 [?] RSPM
P otel 0.2.0 2025-08-29 [?] RSPM
renv 1.0.10 2024-10-05 [1] RSPM (R 4.5.2)
P rlang 1.1.7 2026-01-09 [?] RSPM
P rmarkdown 2.30 2025-09-28 [?] RSPM
P sessioninfo 1.2.3 2025-02-05 [?] RSPM
P xfun 0.56 2026-01-18 [?] RSPM
P yaml 2.3.12 2025-12-10 [?] RSPM
[1] /Users/christinafillmore/Documents/GitHub/CAMIS/renv/library/macos/R-4.5/aarch64-apple-darwin20
[2] /Library/Frameworks/R.framework/Versions/4.5-arm64/Resources/library
P ── Loaded and on-disk path mismatch.
──────────────────────────────────────────────────────────────────────────────