plot_errbar: Plot a xy graph with error bar on x and/or y

In HelpersMG: Tools for Environmental Analyses, Ecotoxicology and Various R Functions

Plot a xy graph with error bar on x and/or y

Description

To plot data, just use it as a normal plot but add the errbar.x and errbar.y values or errbar.x.minus, errbar.x.plus if bars for x axis are asymetric and errbar.y.minus, errbar.y.plus if bars for y axis are asymetric. Use x.plus, x.minus, y.plus and y.minus to set absolut limits for error bars. Note that x.plus and x.minus have priority over errbar.x, errbar.x.minus and errbar.x.plus and that y.plus and y.minus have priority over errbar.y, errbar.y.minus and errbar.y.plus.
The parameter errbar.y.polygon=TRUE permits to define error as an envolop for y axis.

Usage

plot_errbar(
  ...,
  errbar.x = NULL,
  errbar.y = NULL,
  errbar.x.plus = NULL,
  errbar.x.minus = NULL,
  errbar.y.plus = NULL,
  errbar.y.minus = NULL,
  x.plus = NULL,
  x.minus = NULL,
  y.plus = NULL,
  y.minus = NULL,
  errbar.tick = 1/50,
  errbar.lwd = par("lwd"),
  errbar.lty = par("lty"),
  errbar.col = par("fg"),
  errbar.y.polygon = FALSE,
  errbar.y.polygon.list = list(NULL),
  names = NULL,
  add = FALSE
)

Arguments

...	Parameters for plot() such as main= or ylim=
errbar.x	The length of error bars for x. Recycled if necessary.
errbar.y	The length of error bars for y. Recycled if necessary.
errbar.x.plus	The length of positive error bars for x. Recycled if necessary.
errbar.x.minus	The length of negative error bars for x. Recycled if necessary.
errbar.y.plus	The length of positive error bars for y. Recycled if necessary.
errbar.y.minus	The length of negative error bars for y. Recycled if necessary.
x.plus	The absolut position of the positive error bar for x. Recycled if necessary.
x.minus	The absolut position of the negative error bar for x. Recycled if necessary.
y.plus	The absolut position of the positive error bar for y. Recycled if necessary.
y.minus	The absolut position of the nagative error bar for y. Recycled if necessary.
errbar.tick	Size of small ticks at the end of error bars defined as a proportion of total width or height graph size.
errbar.lwd	Error bar line width, see par("lwd")
errbar.lty	Error bar line type, see par("lwd")
errbar.col	Error bar line color, see par("col")
errbar.y.polygon	If true, the errors are shown as a filed polygon.
errbar.y.polygon.list	List of parameters to be used for polygon.
names	The names of the points to be used with show_name().
add	If true, add the graph to the previous one.

Details

plot_errbar plot a xy graph with error bar on x and/or y

Value

A list with x, y and names for points

Author(s)

Marc Girondot [e-mail]

See Also

barplot_errorbar

Other plot and barplot functions: ScalePreviousPlot(), barplot_errbar(), plot_add(), show_name()

Examples

## Not run: 
plot_errbar(1:100, rnorm(100, 1, 2), 
	xlab="axe x", ylab="axe y", bty="n", xlim=c(1,100), 
		errbar.x=2, errbar.y=rnorm(100, 1, 0.1))
x <- 1:100
plot_errbar(x=1:100, rnorm(100, 1, 2), 
               	xlab="axe x", ylab="axe y", bty="n", xlim=c(1,100), 
            		x.minus=x-2, x.plus=x+2)
x <- 1:100
plot_errbar(x=1:100, rnorm(100, 1, 2), 
               	xlab="axe x", ylab="axe y", bty="n", 
               	pch=21, bg="white", 
            		x.minus=x-10, x.plus=x+10)
x <- (1:200)/10
y <- sin(x)
plot_errbar(x=x, y=y, xlab="axe x", ylab="axe y", bty="n", xlim=c(1,20), 
     y.minus=y-1, y.plus=y+1, ylim=c(-3, 3), type="l",  
		errbar.y.polygon=TRUE, 
		errbar.y.polygon.list=list(border=NA, col=rgb(0, 0, 0, 0.5)))
		
## End(Not run)

HelpersMG documentation built on Sept. 12, 2024, 9:35 a.m.