CGEN (version 3.8.0)

QQ.plot: QQ plot

Description

Create a quantile-quantile plot

Usage

QQ.plot(pvalues, op=NULL)

Arguments

pvalues

Vector or matrix of p-values. No default.

op

List of options (see details). The default is NULL.

Details

Plots the ranked p-values against their expected order statistics on a minus log base 10 scale. If pvalues is a matrix, then multiple qq plots will be produced, each on a seperate screen. Options list op: Below are the names for the options list op. All names have default values if they are not specified.

• cex Magnification factor for the plotting symbol. The default is 1.
• cex.axis Magnification factor for the axes. The default is 1.
• cex.lab Magnification factor for the axes labels. The default is 1.
• cex.main Magnification factor for the title. The default is 1.
• color The color of the plot and title. The default is "blue".
• figs Two element vector for the number of rows and columns if pvalues is a matrix. The default is NULL.
• min.p All p-values less than min.p will be set to min.p. The default is 1e-16.
• pch The plotting symbol. The default is 21 (circle).
• title Character string or vector for the title of each plot. If pvalues is a matrix, then the column names will be used if title is NULL. The default is NULL.
• xlim The x-axis limits. The default is determined from pvalues.
• ylim The y-axis limits. The default is determined from pvalues.

See Also

Manhattan.plot

Examples

  set.seed(123)
  p <- runif(1000)
  QQ.plot(p)