[R] Set window title for plot on any OS

[David Winsemius]

On Jul 14, 2013, at 3:42 AM, Simon Zehnder wrote:

> Haha, good point!
> 
> So, the correct code is:
> 
> any(names(formals(getOption("device"))) == "title") {
> 	dev.new(title = "title")
> }
> 

This might be easier to read:

"title" %in% names(formals(getOption("device")) )

-- 

David.
> Thanks for correcting my approach Rolf!
> 
> 
> Best 
> 
> Simon
> 
> On Jul 14, 2013, at 1:02 AM, Rolf Turner <rolf.turner at xtra.co.nz> wrote:
> 
>> 
>> 
>> I think you ought to take a look at
>> 
>>   fortune("Lewis Carroll")
>> 
>>   cheers,
>> 
>>       Rolf Turner
>> 
>> On 14/07/13 01:45, Simon Zehnder wrote:
>>> Hi Duncan,
>>> 
>>> thank you very much for your advice! That makes it all work.
>>> 
>>> I check in addition for a "title" argument in the device via
>>> 
>>> if (any(names(getOption("device")) == TRUE)) {
>>> 	dev.new(title = "title")
>>> }
>>> 
>>> Thanks again!
>>> 
>>> Simon
>>> 
>>> On Jul 13, 2013, at 2:40 PM, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
>>> 
>>>> On 13-07-13 1:33 PM, Simon Zehnder wrote:
>>>>> Dear R-Users,
>>>>> 
>>>>> I am writing a package using S4 classes. In the generic method "plot" I want to set the title for the plotting window as I will have several windows and window titles help the users to distinguish the graphics without putting a title into the plot itself (this can be done by users whenever they want)
>>>>> 
>>>>> So I created a helper function .setDeviceTitle which I called after the plot has been done:
>>>>> 
>>>>> ".setDeviceTitle" <- function(title = "title", dev = dev.cur()) {
>>>>> 	dev <- names(dev)[1]
>>>>> 	
>>>>> 	## check for OS ##
>>>>> 	if (dev == "windows") {
>>>>> 		windows(title = title)
>>>>> 	} else if (dev == "X11") {
>>>>> 		X11(title = title)
>>>>> 	} else {
>>>>> 		quartz(title = title)
>>>>> 	}
>>>>> }
>>>>> 
>>>>> The result is a new device with the title in addition to the old. Is it possible to give a window a title after the plot has been done? If not: Before I plot the device I cannot know what device it will be, so I thought about a check via capabilities():
>>>>> 
>>>>> if (any(names(capabilities()) == "X11")) {
>>>>> 	X11(title = title)
>>>>> }
>>>>> else if (any(names(capabilities)) == "windows") {
>>>>> 	windows(title = title)
>>>>> } else {
>>>>> 	quartz(title = title)
>>>>> }
>>>>> 
>>>>> I want to have a safe method, which works on each OS R can run. How would you solve the problem?
>>>> Use dev.new() rather than picking a particular device.  If all the possible devices support the "title" argument, then
>>>> 
>>>> dev.new(title=title)
>>>> 
>>>> will be fine.  If you might need more customization (or want to protect against a user who chooses a device that doesn't have "title" as an argument), use getOption("device") to examine the call that will be used.
>>>> 
>>>> Duncan Murdoch
>>>> 
> 
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David Winsemius
Alameda, CA, USA