Furthermore, if you have a factor z with the levels in an undesirable order
or missing some levels you can call
z <- factor(z, levels=betterOrderedLevels)
to get them in the order you want. E.g.,
> z <- factor(c("High", "Low", "High"))
> table(z) # levels are in alphabetical order
z
High Low
2 1
> # put them in semantically increasing order and add Medium
> z <- factor(z, levels=c("Low", "Medium", "High"))
> table(z)
z
Low Medium High
1 0 2
You can also rename them by adding the labels argument:
> z2 <- factor(z, levels=c("Low", "Medium", "High"), labels=c("L","M","H"))
> table(z2)
z2
L M H
1 0 2
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
> -----Original Message-----
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
> Behalf
> Of Sarah Goslee
> Sent: Wednesday, December 11, 2013 2:24 PM
> To: Yuanzhi Li
> Cc: r-help
> Subject: Re: [R] bargraph.CI
>
> Without knowing where you got bargraph.CI() I can't answer that part,
> since it isn't part of base R, but the most likely cause is that you
> did not specify the desired levels of your factor.
> You can check with str().
>
> Compare:
>
> > testdata <- factor(c("a", "b", "a", "c", "b"))
> > str(testdata)
> Factor w/ 3 levels "a","b","c": 1 2 1 3 2
> >
> > testdata <- factor(c("a", "b", "a", "c", "b"), levels=c("c", "b", "a"))
> > str(testdata)
> Factor w/ 3 levels "c","b","a": 3 2 3 1 2
>
> Sarah
>
> On Wed, Dec 11, 2013 at 5:06 PM, Yuanzhi Li <yuanzhi...@usherbrooke.ca> wrote:
> > hello,
> >
> > I had a problem with the function "bargraph.CI". "bargraph.CI" draws a
> > figure according to the alphabet sequence of the factor used. For example, I
> > have a factor with for levels "CK", "N5", "N10", "N15", but the bars appear
> > in "CK","N10","N15","N5" order(alphabet sequence), but I want the bars to
> > appear "CK", "N5", "N10", "N15"(treat level sequence). Do you have any
> > ideas to realize the goal?
> >
> > Thank you!
> >
> >
> > Yuanzhi
> >
>
> --
> Sarah Goslee
> http://www.functionaldiversity.org
>
> ______________________________________________
> R-help@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.
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