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
> # 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"),
z2
L M H
1 0 2
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
-----Original Message-----
From:
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 <
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
have a factor with for levels "CK", "N5", "N10", "N15", but the bars
in "CK","N10","N15","N5" order(alphabet sequence), but I want the bars
appear "CK", "N5", "N10", "N15"(treat level sequence). Do you have any
ideas to realize the goal?
Thank you!
Yuanzhi