[R] lattice/ylim: how to fix ylim, but have ylim dynamically calculated?
dwinsemius at comcast.net
Sun Feb 14 22:34:05 CET 2010
On Feb 14, 2010, at 3:40 PM, Johannes Graumann wrote:
> David Winsemius wrote:
>> On Feb 14, 2010, at 10:33 AM, Johannes Graumann wrote:
>>> When drawing "barcharts", I find it not helpful if ylim != 0 -
>>> bars for a
>>> quantity of 0, that do not show a length of 0 are quite non-
>>> I have tried to study
>>> but am unable to figure out where ylim is taken care of and how one
>>> fix ylim to 0 for barcharts ...
>>> Can anyone point out how to tackle this?
>> Looking at Sarkar's "Lattice" text in chapter 8 section 3 "Limits and
>> Aspect Ratio", it appears from subsection 1 that the prepanel
>> can used to supply values of xlim and ylim values. From subsection 2
>> he clarifies that xlim and ylim can also be specified on a per panel
>> basis (and here I am guessing that this would be within a scales
>> argument) when relation="free". At the end of that section he offers
>> two examples using ylim: the first is not plotted but the second uses
>> the prepanel mechanism for Fig 8.1 and that is probably available on
>> the Lattice website.
>> In the same subsection is offered an alternative to specifying an
>> explicit scales$y$limits to be interpreted as ylim values.
>> My hope it that these ideas and references will be of some use in
>> identifying productive places to look for further documentation.
> I am quite certain that this is the most elaborately worded version of
> "RTFM" I have ever come across.
Well, not really, it was a version of ... here's my best untested wild
guess from someone who persistently struggles with trying to get panel
> I shall go and do so.
> Sincerely, Joh
David Winsemius, MD
West Hartford, CT
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