Sandy,
You can re-order a factor with
df$Eyeball<-factor(df$Eyeball, levels=c("Normal", "Mild", "Moderate",
"Severe"), ordered=T)
(assuming df is your data frame and that you want an _ordered_ factor;
the latter is not essential to your plots)
Incidentally, "NULL" isn't a particularly friendly item to find in a
data frame. NULL often implies "I'm not here at all" while NA says "I
exist but I'm a missing value". For an example of when it might matter,
try
length(c(1,2,NULL,3))
#versus
length(c(1,2,NA,3))
Steve E
>>> Sandy Small <[EMAIL PROTECTED]> 01/08/2008 16:21:29 >>>
Hi
I'm sure this question has been asked before but I can't find it in the
archives.
> I want to plot them in the order "Normal", "Mild",
"Moderate", "Severe" so that the trend (or not) is obvious.
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