[R] why the length and width of a plot region produced by the dev.new() function cannot be correctly set?

[Duncan Murdoch]

On 04/05/2018 3:04 AM, sunyeping via R-help wrote:
> 
> ------------------------------------------------------------------From:David Winsemius <dwinsemius using comcast.net>Send Time:2018 May 4 (Fri) 13:25To:孙业平 <sunyeping using aliyun.com>Cc:R Help Mailing List <r-help using r-project.org>Subject:Re: [R] why the length and width of a plot region produced by the dev.new() function cannot be correctly set?
> 
>>   On May 3, 2018, at 6:28 PM, sunyeping via R-help <r-help using r-project.org> wrote:
>>   
>>   When I check the size of the plot region usingdev.size("in")a new plot region is produced and in the Rconsole I get[1] 5.333333 5.322917
> 
> Your test is all mangleed together. You failed in your duty to read the list info and the Posting guide . NO HTML!
> 
>>   If I mean to produce a plot region with size setting bydev.new(length=3,width=3)a plot region is produced, but the size is [2.281250, 5.322917], as detected by the de.size function. If I type:dev.new(length=10,width=10)I get a plot region of with the size of [7.614583, 5.322917]. It seems that the width of the new plot region cannot be set, and tt is always 5.322917. The length of the new plot region can be set, but it is always smaller that the values I set.What do I miss? What is the correct way of setting the dimension of the new plot region? I will be grateful to any help.Best regards,
> 
> The size of the device is not the size of the plot region. You need to take into account the margins. See ?par
> Thank you, David.I have read the par() document. Clearly the size of the plot region is smaller than or equal to the divice size. However, if I produce a graphic device with dev.new (length, width) or other functions, I find the largest  width of the new device is always 5.3 inches whatever the values I set, and the length of it is alway smaller than what I set.

The length and width aren't the first and second parameters for any 
device, and length isn't a parameter at all.  Try

dev.new(height = 10, width = 10)

and you should get a bigger device if it will fit on your screen.  If it 
won't fit, then you might get a smaller one, and you'll need to choose a 
non-screen device such as png() or pdf() instead of the default device.

Duncan Murdoch

  Could you tell me how to produce a graphic divice with correct size 
that I set? I need this function because the graphic divice cannot 
accomendate all of the graph I make with some of plot tools such as 
ggtree. In ggtree plot, part of the tree tips label are invisible 
(https://www.dropbox.com/s/87gyusx7ay1xxu8/tree.pdf?dl=0) even I set 
"par(mar=rep(0,4))". So I think I must plot the tree on a larger graphic 
device.  Best regards.
> 
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> 
> David Winsemius
> Alameda, CA, USA
> 
> 'Any technology distinguishable from magic is insufficiently advanced.'   -Gehm's Corollary to Clarke's Third Law
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