[R] [lattice xyplot] Help needed in help in customizing the panel.abline() function

[Felix Andrews]

Hi Girish,

Try this:

disc <- xyplot(cnt_gt50pct_disc ~ week_num|sku_num, data=DF,type =
"h",lwd=2,panel = function(x, y, ...) {
          panel.abline(v = x[which.max(y)], lty = 2)
          panel.xyplot(x, y, ...)
      })

-Felix


On 9 December 2010 17:35, Girish A.R. <garamach at gmail.com> wrote:
>
> Hi folks,
>
> I need some help in customizing the abline() function to be used in a
> lattice plot. I have attached a reproducible example below.
>
> I need help in the following snippet:
> disc <- xyplot(cnt_gt50pct_disc ~ week_num|sku_num, data=DF,type =
> "h",lwd=2,panel = function(...) {
>           panel.abline(v = 8, lty = 2)
>           panel.xyplot(...)
>       })
>
> Is there a way I can give panel.abline() input from a which.max() function?
> Essentially I need the vertical line to be drawn at the week_num
> corresponding to the max (cnt_gt50pct_disc).
>
> Thanks in advance,
>
> -Girish
>
> ===========================================
> Lines <- "sku_num week_num    pct_inv_left    cnt_gt50pct_disc
> 1   1   99.88   47
> 1   2   99.54   109
> 1   3   98.7    260
> 1   4   97.83   202
> 1   5   96.53   389
> 1   6   94.11   450
> 1   7   90.42   459
> 1   8   86.63   448
> 1   9   83.39   411
> 1   10  77  478
> 1   11  71.65   476
> 1   12  67.3    463
> 1   13  62.45   472
> 1   14  52.47   488
> 1   15  40.86   486
> 1   16  31.34   484
> 1   17  23.2    472
> 1   18  17  458
> 1   19  12.66   423
> 1   20  10.18   364
> 1   21  7.6 343
> 1   22  3.09    343
> 1   23  1.05    211
> 2   1   99.94   30
> 2   2   99.4    151
> 2   3   98.85   146
> 2   4   97.92   274
> 2   5   97.03   204
> 2   6   95.59   378
> 2   7   92.81   452
> 2   8   89.07   470
> 2   9   85.11   454
> 2   10  81.68   421
> 2   11  75.34   479
> 2   12  70.05   476
> 2   13  66.11   456
> 2   14  61.85   465
> 2   15  53.2    485
> 2   16  42.75   486
> 2   17  33.58   481
> 2   18  25  477
> 2   19  18.13   450
> 2   20  12.97   416
> 2   21  10.03   343
> 2   22  7.03    293
> 2   23  2.33    283
> 2   24  0.77    116
> "
>
> DF <- read.table(con<- textConnection(Lines), skip = 1);
> names(DF) <- scan(textConnection(Lines), what = "", nlines = 1) ;
> close(con);
>
> require(latticeExtra)
> DF$sku_num <- as.factor(DF$sku_num)
> disc <- xyplot(cnt_gt50pct_disc ~ week_num|sku_num, data=DF,type =
> "h",lwd=2,panel = function(...) {
>           panel.abline(v = 8, lty = 2)
>           panel.xyplot(...)
>       })
> sales <- xyplot(pct_inv_left  ~ week_num|sku_num, data=swtop16,type =
> "l",lwd=2,panel = function(...) {
>           panel.abline(h = 75, lty = 2)
>           panel.xyplot(...)
>       })
> doubleYScale(disc, sales, style1 = 0, style2 = 2, add.ylab2 = TRUE,text =
> c("# stores with gt 50pct disc", "% Unsold"))
> --
> View this message in context: http://r.789695.n4.nabble.com/lattice-xyplot-Help-needed-in-help-in-customizing-the-panel-abline-function-tp3079656p3079656.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Felix Andrews / 安福立
http://www.neurofractal.org/felix/