you can't refer to an argument within a function call. Try
uiw <- Saline[,3]
plotCI(x=Saline [,1],y=Saline [,2], uiw=uiw, liw=uiw, err=y, pch=21,
pt.bg=par("bg"), cex=1.5, lty=1, type="o", gap=0,
sfrac=0.005,
xlim=c(-21,340),xaxp=c(-20,320,11), xlab="Time (min)", ylim=c(0,12),
yaxp=c(0,12,11), ylab="Arterial Plasma Acetaminophen (?g/mL)", las=1,
font.lab=2, add=TRUE)
Cheers
Joris
On Sat, Jun 5, 2010 at 6:09 PM, beloitstudent <schurrk at beloit.edu>
wrote:>
> Hello all,
>
> I am an undergraduate student who is having syntax issues trying to get
> error bars on my graph.
>
> This is the data, which I assigned the name "Saline" to.
> ?Time ? ? ? Average ? ? ? SEM
> 1 ? -20 ? ? ?0.000000 ? ? 0.0000000
> 2
> 3 ? ?30 ? ? ?0.000000 ? ? 0.0000000
> 4 ? ?45 ? ? ?3.227902 ? ? 0.7462524
> 5 ? ?60 ? ? ?5.066664 ? ? 1.1623944
> 6 ? ?80 ? ? ?6.107491 ? ? 1.5027762
> 7 ? 110 ? ? 6.968231 ? ? 1.3799637
> 8 ? 140 ? ? 7.325713 ? ? 1.2282053
> 9 ? 200 ? ? 7.875194 ? ? 1.1185175
> 10 ?260 ? ?6.513927 ? ? 0.5386359
> 11 ?320 ? ?4.204342 ? ? 0.6855906
>
> This is the command that I typed in to get my error bars.
>
> plotCI(x=Saline [,1],y=Saline [,2], uiw=Saline [,3], liw=uiw, err=y,
pch=21,
> pt.bg=par("bg"), cex=1.5, lty=1, type="o", gap=0,
sfrac=0.005,
> xlim=c(-21,340),xaxp=c(-20,320,11), xlab="Time (min)",
ylim=c(0,12),
> yaxp=c(0,12,11), ylab="Arterial Plasma Acetaminophen (?g/mL)",
las=1,
> font.lab=2, add=TRUE)
>
> And this is the error message I keep getting
> Error in plotCI(x = Saline[, 1], y = Saline[, 2], uiw = Saline[, 3], liw
> uiw, ?:
> ?object 'uiw' not found
> In addition: Warning message:
> In if (err == "y") z <- y else z <- x :
> ?the condition has length > 1 and only the first element will be used
>
> Now, to me, the command seems correct.
> I want the error bars to show up where the points on my graph are...so the
x
> coordinates should be my time (aka Saline [1]) and the y coordinates should
> be my Averages (aka Saline [2]) ?and my upper and lower limits to my
> confidence interval should be the SEM from Saline [3], but something is
> wrong with this and I cannot figure out what it is. ?If anyone has
> suggestions I would be very grateful. ?Thanks for your help!
>
> beloitstudent
> --
> View this message in context:
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> Sent from the R help mailing list archive at Nabble.com.
>
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Ghent University
Faculty of Bioscience Engineering
Department of Applied mathematics, biometrics and process control
tel : +32 9 264 59 87
Joris.Meys at Ugent.be
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