zoomplot.zoom: Central low level function of the zoom package.

In zoom: A Spatial Data Visualization Tool

Central low level function of the zoom package.

Description

This function allows to replot the current or a saved plot with specific boundaries, magnification factor and possibly arround a user defined x/y.

Usage

zoomplot.zoom(
  xlim = NULL,
  ylim = NULL,
  fact = NULL,
  moveX = NULL,
  moveY = NULL,
  rp = NULL,
  x = NULL,
  y = NULL,
  xlimfn = NULL,
  ylimfn = NULL,
  ...
)

Arguments

xlim	A vector with min and max x
ylim	A vector with min and max y
fact	A scalar giving the magnification factor (>1 brings you closer)
moveX	Expected shift on X axis.
moveY	Expected shift on Y axis. corresponding warnings in ?recordPlot.
rp	A previously recorded plot with recordPlot(). With all the
x	x of a fix point when rescaling, by default the center.
y	y of a fix point when rescaling, by default the center.
xlimfn	a function using x, y and/or fact to generate new x lim if NULL and xlim/ylim not given will use multipancPoint
ylimfn	a function using x, y and/or fact to generate new y lim, if NULL will use xlimfn
...	Additional parameters not implemented, just in case.

Details

This function is not necessarily easy to use by hand. It is designed to work well when called from higher level functions. End user should always use zm().

Value

Not guaranted for now.

Note

This function is the heart of the zoom package and the one that can be. affected by R version changes. It is inspired by the zoomplot function in TeachingDemos package

Author(s)

Corentin M. Barbu

See Also

zm, in.zoom

Examples

plot(rnorm(1000),rnorm(1000))
zoomplot.zoom(fact=2,x=0,y=0)

zoom documentation built on May 31, 2022, 5:05 p.m.