[R] Resize Graphics Window

[Sigal Blay]

Here's a simplified code example.


library(grid)
vp1 <- viewport(height=0.8, width=0.8, default.unit="snpc")
vp2 <- viewport(y = 0.5, just="bottom", gp=gpar(col="red", lwd="2"))

# draw triangle
function1 <- function(vp) {
  grid.polygon(x=c(0,0.5,1), y=c(0.5,0,0.5), name="triangle", vp=vp)
}

# draw n horizontal lines above the triangle
function2 <- function(n, vp) {
   vp2$height <- unit(n*0.2, "npc")
   for (i in 1:n)
     grid.lines(x=c(0,1), y=c(i*0.2, i*0.2), vp=vp)
}

function1(vp1)
pushViewport(vp1)
function2(5, vp2)  # User needs to draw 5 lines above triangle
popViewport()


----- Original Message -----
From: "Tal Galili" <tal.galili at gmail.com>
To: "Sigal Blay" <sblay at sfu.ca>
Cc: r-help at r-project.org
Sent: Saturday, May 1, 2010 11:48:43 PM GMT -08:00 US/Canada Pacific
Subject: Re: [R] Resize Graphics Window



Hi Sigal, could you give a simple example ? 


I can imagine in some cases that enlarging the windows would help, but on others there are other parameters you would like to play with instead. So having an example to solve, will help people help you. 


Tal 


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On Sat, May 1, 2010 at 7:40 AM, Sigal Blay < sblay at sfu.ca > wrote: 


Need way to resize an existing graphics window. 
This should be applicable across platforms (as part of a package). 
Context: function1() draws main plot (I'm using grid), function2() adds smaller plot 
above main plot, but this one can sometimes overflow the original graphics window 
area. 

Thanks, 
Sigal 

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