[R] Plotting Multiple Factors By Dates With Lattice

[arun]

You could remove the white space also by:
library(stringr)
levels(bdf$func_feed_grp)
#[1] "Filterer"        " Gatherer      " " Grazer        " " Omnivore      "
#[5] " Parasite      " " Predator      " " Shredder      "


levels(bdf$func_feed_grp)<- str_trim(levels(bdf$func_feed_grp))
levels(bdf$func_feed_grp)
#[1] "Filterer" "Gatherer" "Grazer"   "Omnivore" "Parasite" "Predator" "Shredder"

A.K.



----- Original Message -----
From: Rich Shepard <rshepard at appl-ecosys.com>
To: R help <r-help at r-project.org>
Cc: 
Sent: Friday, August 16, 2013 12:01 PM
Subject: Re: [R] Plotting Multiple Factors By Dates With Lattice

On Fri, 16 Aug 2013, Richard M. Heiberger wrote:

> The major problem is all the padding and the LF in the level names.
> This repair is based on the ?gsub example on "## trim trailing white space".

Rich

  Thanks. I thought of removing white space (didn't notice the spurious
newline) in emacs but did not see that it made a difference. Now I know it
does I'll clean up all the files.

> I switched the key to "lines" to match the graph.

  OK.

> You need to control the color choice differently when using a key.
> It is discussed in ?xyplot in the paragraph
>          Note that 'simpleKey' uses the default settings (see
>          'trellis.par.get') to determine the graphical parameters in
>          the key, so the resulting legend will be meaningful only if
>          the same settings are used in the plot as well.  The
>          'par.settings' argument may be useful to temporarily modify
>          the default settings for this purpose.

  I'll carefully read it.

> xyplot(pct ~ sampdate, data = bdf, groups = func_feed_grp, type = 'l',
>       key = simpleKey(text = levels(bdf$func_feed_grp), space ='right',
> points=FALSE, lines=TRUE),
>       par.settings=list(superpose.points=list(col=rainbow(7)),
> superpose.lines=list(col=rainbow(7))))

  Valuable lessons learned here. Again, thanks.

Rich

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