berryFunctions (version 1.9.0)

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, usecolp=FALSE,
xlab=substitute(x), ylab=substitute(y), quiet=FALSE, expr, ...)

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

usecolp

logical: use colPoints when zooming? DEFAULT: FALSE

xlab

xlabel See plot. DEFAULT: substitute(x)

ylab

dito

quiet

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

expr

Characterized Expression to be executed after each plot, eg. expr='abline(h=3)'

...

further arguments passed to plot or colPoints.

Value

• none, works in existing graphics

See Also

shapeZoom in https://github.com/brry/shapeInteractive, colPoints, locator

Examples

## Examples rely on locator, so can't be checked in non-interactive R use.
## Rcmd check --as-cran doesn't like to open external devices,
## so this example is excluded from running in the checks.
a <- rnorm(90); b <- rexp(90)
windows(record=TRUE) # turn recording on
plot(a,b, las=1)
pointZoom(a,b, col=2, expr="abline(v=0)")
# now scroll through the plots (Pg Up and Pg Dn) to unzoom again.

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