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 4.4.2 (2024-10-31)
os macOS Sequoia 15.6.1
system aarch64, darwin20
ui X11
language (EN)
collate en_US.UTF-8
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tz Europe/London
date 2025-10-13
pandoc 3.4 @ /Applications/RStudio.app/Contents/Resources/app/quarto/bin/tools/aarch64/ (via rmarkdown)
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P ── Loaded and on-disk path mismatch.
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