[R] bwplot puts the bars in the wrong place

[Peter Ehlers]

James,

Your problem with bwplot is with your scales definition.
bwplot places the plots at locations 1:24; you can then
supply arbitrary labels for these locations. Try changing
the following:

  xlim = c(-1, 24) to xlim = c(0, 25)
  at = hrs to at = hrs + 1 (or redefine hrs)

As to needing to use 'gdf$': this makes no sense to me.
What error occurs if you leave that off?

  -Peter Ehlers

On 2010-04-17 13:00, James Rome wrote:
> David,
>
> I did post a solved message:
>          hrs = seq(0, 23, 1)
>          hrlabs = as.character(seq(0,23,1))
>          g = xyplot(gdf$tt~gdf$OnHour |gdf$Runway, data=gdf, ylab="Taxi
> time (min)", main=title, xlab="Hour of day",
>              xlim=c(-1, 24), scales=list(x = list(rot=90, cex=.6,
> alternating=c(3,3,3,3),
>              at=hrs, labels=hrlabs
>              )),
>              panel=function(x, ...) {
>                  panel.grid(h = -1, v = 24)
>                  panel.bwplot(x, horizontal=FALSE, col="black",...)
>
>              }
>          )
>          print(g)
> created the plot I sent you (withxyplot.png), with the 0 data plotted on
> zero, and the 3AM data blank.
>
> I arrived at this by doing xyplot and observing that the points were
> plotted correctly. Then I added panel.bwplot() and it was still correct,
> so I removed panel.xyplot() and it worked. But replacing the main call
> to xyplot with bwplot gets it wrong.
> For example, I did it with
>
>          hrs = seq(0, 23, 1)
>          hrlabs = as.character(seq(0,23,1))
>          g = bwplot(gdf$tt~gdf$OnHFact |gdf$Runway, data=gdf, ylab="Taxi
> time (min)", main=title, xlab="Hour of day",
>              xlim=c(-1, 24), horizontal=FALSE, drop.unused.levels=FALSE,
>              scales=list(x = list(rot=90, cex=.6, alternating=c(3,3,3,3),
>              at=hrs, labels=hrlabs
>              )),
>              panel=function(x, ...) {
>                  panel.grid(h = -1, v = 24)
>                  panel.bwplot(x,
> col="black",...)
>              }
>          )
>          print(g)
> and get the attached withbwplotAndFactors.png, which is wrong. It was
> also wrong with OnHour, and with drop.unused.levels=TRUE.
>
> And I did indeed get errors if I left the gdf$ out of the formulas,
> because it is defined in many data frames.
>
> Thanks,
> Jim
>
> On 4/17/2010 12:35 PM, David Winsemius wrote:
> On Apr 17, 2010, at 12:29 PM, James Rome wrote:
>
>> It has all the data needed, and only that data, which I got dinged on
>> before.
>
> I was seeing a different number of points in some panels in your plot
> compared to my plot. I have not downloaded the most recent dataset, and
> from what you are saying here should  I assume it had not changed? But
> your plot had a title that could not have been created by the posted
> code , so i just don't know where you are with all of this. Are you
> going to post a SOLVED message when it is finally answered?
>
>
>
>
>
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-- 
Peter Ehlers
University of Calgary