percplot: Plot top and bottom percentiles of selected variables

In dataprep: Fast, Efficient, and Versatile Data Preprocessing and Reshaping with 'C++', 'OpenMP' & 'SIMD'

Plot top and bottom percentiles of selected variables

Description

Plots percentiles computed by percdata using ggplot2.

Usage

percplot(data, cols = NULL, group = NULL, diff = 0.1,
         part = "both", ncol = NULL, num_xaxis = "auto",
         verbose = FALSE)

Arguments

data	A data frame.
cols	Column indices or names of numeric variables.
group	Grouping column.
diff	Difference between quantile probabilities.
part	Which part to plot: "both", "bottom", or "top". For backward compatibility, part also accepts the integer codes 2 ("both"), 0 ("bottom"), and 1 ("top").
ncol	Number of columns in facet layout.
num_xaxis	How to treat numeric column names on the x-axis. "auto": use "log" if column names are numeric and evenly spaced on a log scale with a range ratio >= 1000, otherwise keep them as factor levels. "log" or "numeric": force the corresponding scale. "character", "factor", "keep", or FALSE: keep as character/factor.
verbose	Logical; if TRUE, prints timing message.

Value

A ggplot object.

Author(s)

Chun-Sheng Liang <[e-mail]>

References

1. Example data is from https://smear.avaa.csc.fi/download. It includes particle number concentrations in SMEAR I Varrio forest. 2. Wickham, H. 2016. ggplot2: elegant graphics for data analysis. Springer-Verlag New York.

Examples

percplot(data, cols = 5:65, group = 4)
percplot(data, cols = 5:65, group = 4, num_xaxis = "numeric")

dataprep documentation built on Oct. 1, 2026, 5:07 p.m.