anim.segments {anim.plots}

R Documentation

Draw an animation of line segments or arrows.

Description

Draw an animation of line segments or arrows.

Usage

anim.segments(
  x0,
  y0,
  x1 = NULL,
  y1 = NULL,
  times = NULL,
  speed = 1,
  show = TRUE,
  use.times = TRUE,
  window = t,
  window.process = NULL,
  fn = segments,
  col = NULL,
  lty = NULL,
  lwd = NULL,
  ...
)

anim.arrows(..., length = 0.25, angle = 30, code = 2)

anim.segmentplot(...)

anim.arrowplot(...)

Arguments

x0, y0, x1, y1, col, lty, lwd, length, angle, code, ...	arguments passed to segments or arrows
times, speed, show, use.times, window, window.process	see anim.plot for details
fn	underlying function to use

Details

anim.segments and anim.arrows draw lines on to an existing plot. If you want to redraw the plot between each frame, use anim.arrowplot or anim.segmentplot.

If both x1 and y1 are missing, then segments are plotted from the current time to the following time in each frame. If only x1 is missing it is set equal to x0, similarly if only y1 is missing.

Examples

anim.segments(x0=rep(1:5, 5), y0=rep(1:5, each=5), y1=rep(2:6, each=5), 
     times=rep(1:5, each=5) )
 
## Short version
anim.arrowplot(rep(1:5, 5), rep(1:5, each=5), times=5)

if (require('maps')) {
   hr <- subset(hurricanes, lat > 0 & lat < 50 & lon > -95 & lon < -20 & 
         Shour %% 6 == 0)
   hr$dlat <- cos(hr$diruv/360*2*pi) * hr$maguv / 8
   hr$dlon <- sin(hr$diruv/360*2*pi) * hr$maguv / 8
   hr$name <- sub("\\s+$", "", hr$name)
   map('world', xlim=c(-95,-20), ylim=c(0,50))
   title("Hurricanes, 2009")
   with(hr[!duplicated(hr$name),], text(lon, lat, 
         labels=paste0(name, "\n", Yr), cex=0.8))
   with(hr, anim.arrows(x0=lon, y0=lat, y1=lat+dlat, x1=lon+dlon, 
         times=Shour, speed=12, col=rgb(0,0,1,0.8), length=.1, lwd=2)) 
}

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