dense2d: 2D density heatmap plot

In raim/segmenTools: Tools for Functional Genome Exploration

2D density heatmap plot

Description

Uses base R's densCols to calculate local densities at each point in a scatterplot, and then replaces them by a colored scheme, copied from Josh O'Brien posted at https://stackoverflow.com/questions/17093935/r-scatter-plot-symbol-color-represents-number-of-overlapping-points/17096661#17096661

Usage

dense2d(
  x,
  y,
  pch = 20,
  nbin = c(128, 128),
  circular = FALSE,
  x.circular = FALSE,
  y.circular = FALSE,
  xlim,
  ylim,
  colf = viridis::viridis,
  ...
)

Arguments

x	x-coordinates
y	y-coordinates
pch	pch argument to plot
nbin	number of bins for both dimensions, can be a single. number for both dimensions, or separate numbers, see argument nbins to function densCols and gridsize to bkde2D.
circular	treat x and y as circular coordinates in radian.
x.circular	treat x as circular coordinates in radian.
y.circular	treat y as circular coordinates in radian.
xlim	numeric vectors of length 2, giving the x coordinate ranges.
ylim	as xlim for y.
colf	color map function used to create a color gradient, eg. colorRampPalette or viridis.
...	arguments to plot (hint:cex can be useful).

Value

the plotted data.frame, including local densities.

raim/segmenTools documentation built on March 29, 2025, 9:36 p.m.