[R] plot.default and open ended limits

[Thomas Lumley]

On Sun, 9 Jan 2005, Dan Bolser wrote:

> On Sun, 9 Jan 2005, [ISO-8859-1] Romain François wrote:
>
>> Hello Dan,
>>
>> Look at the code of the plot.default function, you'll see that's not
>> possible to specify one limit, nevertheless, you can do :
>
> Suppose I wanted to contribute a 'fix' to the code to allow one of my
> suggested syntax solutions below, how would I go about it?

The preferred way is to send a patch against the current (R-devel) 
sources, but if you are modifying a short function it's probably ok to 
send just the modified version (being careful not to change indenting and 
spacing  in lines you don't modify).

However, while we never want to discourage people from contributing fixes, 
I will note that users will expect ylim=c(0,NA) to work for all plot() 
methods that accept ylim, if it works for plot.default.  Some of these 
pass their xlim and ylim to  plot.default, so it will happen 
automatically, but some probably don't.


 	-thomas

>
> Cheers,
>
>
>>
>> plot(x,y,ylim=c(0,max(y)))
>>
>>
>> Does it work for you ?
>>
>> Cordialement. Romain.
>>
>> Dan Bolser a écrit :
>>
>>> Hi, I would like to bound the lower limit of my y scale to zero, and let R
>>> chose an upper limit.
>>>
>>> Something like
>>>
>>> plot(x,ylim=c(0,))
>>>
>>> or
>>>
>>> plot(x,ylim=c(0,na))
>>>
>>> but nither of these do the job. I searched the docs, but I can't see a way
>>> to do this.
>>>
>>>
>>> Naturally its nothing I can't do 'by hand', I would just like to know if a
>>> correct syntax exists.
>>>
>>>
>>>
>>
>
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Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle