berryFunctions (version 1.4)

pointZoom: zoom in originally static x11 graphics

Description

zoom in x11 graphics - uses locator to define region to zoom into

Usage

pointZoom(x, y=NA, z=NA, Time=1, steps=30, las=1, colp=FALSE,
xlab=substitute(x), ylab=substitute(y), notify=TRUE, ...)

Arguments

x

same x coordinates as in current plot. x can be a matrix, then the y (and z) coordinates are taken from the second (and third) column.

y

ditto

z

if using colpoints, z-value

Time

Duration of zooming (speed) in seconds. DEFAULT: 1

steps

number of single zoomlevels. DEFAULT: 30

las

label axis style, see par. DEFAULT: 1

colp

logical: use colPoints when zooming? DEFAULT: FALSE

xlab

xlabel See plot. DEFAULT: substitute(x)

ylab

dito

notify

logical. Should notifications (instructions) be written to the console? DEFAULT: TRUE

...

further arguments passed to plot or colpoints.

Value

• none, works in existing graphics

See Also

shapeZoom, colPoints, locator

Examples

## Examples rely on locator, so can't be checked in non-interactive R use.
a <- rnorm(90); b <- rexp(90)
windows(record=TRUE) # turn recording on
plot(a,b, las=1)
pointZoom(a,b)
# now scroll through the plots (Pg Up and Pg Dn) to unzoom again.

d <- data.frame(a,b)
class(d)
plot(d)
pointZoom(d)