erp: plot an ERP waveform

In erpR: Event-related potentials (ERP) analysis, graphics and utility functions

Description

A function to plot an ERP waveform of a single electrode. If used with default values the function allows a fast plotting. Several parameters are available for plotting paper quality plots.

Usage

erp(el, startmsec=-200, endmsec = 1200, smo = NULL, interval = c(startmsec, endmsec),
xlim = c(startmsec, endmsec), ylim = c(-6,6), col = "black", 
lwd = 1, xlab = "", ylab = "", main = "", frame.plot = TRUE,
draw.xaxis = TRUE, draw.yaxis = TRUE, type = "l", x0 = TRUE,
x.tick = seq(-200, 1200, 200), x.labels=x.tick, x.pos = NA, 
x.outer = F, x.font = NA, x.lty = "solid", x.lwd = 1, x.lwd.ticks = 1, 
x.col = NULL,  x.col.ticks = NULL, x.hadj = NA, x.padj = NA, x.tcl = -0.5, 
x.tick.both= FALSE, x.cex = 1, y.tick = seq(-6,6,2), y.labels = y.tick,  
y.pos = NA, y.outer = F, y.font = NA, y.lty = "solid", y.lwd = 1, 
y.lwd.ticks = 1, y.col = NULL, y.col.ticks = NULL, y.hadj = NA, y.padj = NA, 
y.tcl = -0.5, y.tick.both= FALSE, y.cex = 1, ...)

Arguments

el	a vector with the electrode to be plotted.
startmsec	the start time (in ms) of the ERP vector.
endmsec	the end time (in ms) of the ERP vector.
smo	the smoothing parameter to apply (see smooth.spline). Default is NULL and no smoothing is applied.
interval	a vector with a pair of values indicating the interval (in milliseconds) to be plotted.
xlim	a vector with a pair of values indicating the limits (in milliseconds) of the x axis.
ylim	a vector with a pair of values indicating the limits (in milliseconds) of the x axis.
col	the color of the ERP waveform.
lwd	the line width of the ERP waveform.
xlab	the label of the x axis.
ylab	the label of the y axis.
main	the title of the plot.
frame.plot	a logical indicating whether a box should be drawn around the plot.
draw.xaxis	a logical indicating whether the x axis should be drawn.
draw.yaxis	a logical indicating whether a box should be drawn around the plot.
type	1-character string giving the type of plot desired. Default is "l" and a line will be plotted. If "n" the ERP waveform is not plotted (see plot.default).
x0	a logical indicating whether a short segment should be drawn to indicate the 0 point (in millisecond)
x.tick	the position (in milliseconds) of x ticks.
x.labels	the labels (usually a vector of numbers) to be plotted on the x axis.
x.pos	the position of x axis, in terms of y axis coordinates. Default is NA and the axis is drawn at the bottom of the plot.
x.outer	a logical value indicating whether the x axis should be drawn in the outer plot margin, rather than the standard plot margin.
x.font	font for text of x labels. Defaults to par("font").
x.lty	line type for both the x axis line and the x tick marks.
x.lwd	line width for the x axis line.
x.lwd.ticks	line width for the x tick marks.
x.col	colors for the x axis line and the x tick marks.
x.col.ticks	color for the x tick marks (if specified, override x.col)
x.hadj	adjustment (see par("adj")) for all x labels parallel ("horizontal") to the reading direction. If this is not a finite value, the default is used (centring for strings parallel to the axis, justification of the end nearest the axis otherwise).
x.padj	adjustment for each x tick label perpendicular to the reading direction. For labels parallel to the axes, padj = 0 means right or top alignment, and padj = 1 means left or bottom alignment. This can be a vector given a value for each string, and will be recycled as necessary.
x.tcl	The length of tick marks as a fraction of the height of a line of text. The default value is -0.5.
x.tick.both	Logical. Should the tick marks be drawn both above and below the x axis?
x.cex	The magnification to be used for the x labels.
y.tick	the position (in milliseconds) of y ticks.
y.labels	the labels (usually a vector of numbers) to be plotted on the y axis.
y.pos	the position of y axis, in terms of x axis coordinates. Default is NA and the axis is drawn at the left of the plot.
y.outer	a logical value indicating whether the y axis should be drawn in the outer plot margin, rather than the standard plot margin.
y.font	font for teyt of y labels. Defaults to par("font").
y.lty	line type for both the y axis line and the y tick marks.
y.lwd	line width for the y axis line.
y.lwd.ticks	line width for the y tick marks.
y.col	colors for the y axis line and the y tick marks.
y.col.ticks	color for the y tick marks (if specified, override y.col)
y.hadj	adjustment (see par("adj")) for all y labels parallel ("horizontal") to the reading direction. If this is not a finite value, the default is used (centring for strings parallel to the axis, justification of the end nearest the axis otherwise).
y.padj	adjustment for each y tick label perpendicular to the reading direction. For labels parallel to the ayes, padj = 0 means right or top alignment, and padj = 1 means left or bottom alignment. This can be a vector given a value for each string, and will be recycled as necessary.
y.tcl	The length of tick marks as a fraction of the height of a line of teyt. The default value is -0.5.
y.tick.both	Logical. Should the tick marks be drawn both above and below the y axis?
y.cex	The magnification to be used for the y labels.
...	further parameters to be passed to plot.

Value

the plot of an ERP waveform.

Author(s)

Giorgio Arcara

See Also

erp.t, erp.infl, erp.cor, erp.xaxis, erp.yaxis

Examples

data(ERPsets)

word=grandaverage("Exp1_word_subj", 1:20, erplist=ERPsets) 

erp(word$F3, smo=0, col="blue", startmsec=-200, endmsec=1500, ylim=c(-6,6))

erpR documentation built on May 2, 2019, 3:33 p.m.