I have a dataframe such that when I enter the dataframe name at the R prompt
and see the data, the order of the data is correct (ie. what I want -
ordered numerically by the factor, class). The table is akin to the
following:
df: (dataframe = df)
uniqueID class age
a 1 32
b 1 21
c 1 13
d 1 11
e 3 15
f 3 16
g 3 31
h 3 25
i 4 23
j 4 32
k 4 31
l 7 11
m 7 6
n 7 20
o 10 19
p 10 25
q 10 42
.
.
.
uniqueID and class are factors. Yesterday I think I managed to figure out
how to arrange the column "class" in "numerical" order (when it lists) even
though it's a "character" factor. (although feel free to pipe in an answer
on that too - since I was trying a lot of different things!)
Now, when I execute the following command:
barplot(by(df[,"age"],df$class,FUN=function(x) quantile(x,0.95)))
the x-labels or "class" of each bar is in *character* order, not *numerical
order.
Is there a way to rearrage this so that each bar label (categorical x-label)
is in numerical order?
Thanks in advance!!!
Best,
Scott
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