On Fri, 18 Feb 2005 13:00:40 +0100 T Petersen wrote:
Wow, I'm getting confused...The syntax Petr suggested does what I
wanted, but things are stille wrong...Maybe a bug? Let me explain.
I got two vectors:
x = c(3, 3, 3, 4, 3, 4, 3, 4, 3, 4)
y = c(5, 2, 5, 5, 2, 2, 5, 5, 4, 2)
then I do the barplot you suggest
barplot(rbind(table(x), table(y)), beside=T)
but things are wrong(there is no bar for catagory "3") and I get an
error message: Warning message:
number of columns of result
not a multiple of vector length (arg 1) in:
rbind(table(Quest1), table(Quest2))
Any ideas?
If x and y are categorical variables, you should tell R so (i.e.,
convert to a factor) and if both should have the same categories (i.e.,
levels) you can supply this information as well:
R> x <- factor(x, levels = 2:5)
R> y <- factor(y, levels = 2:5)
Then, table() knows which categories to use:
R> rbind(x = table(x), y = table(y))
2 3 4 5
x 0 6 4 0
y 4 0 1 5
and also the barplot() call given above will do the right thing.
Z
Petr Pikal wrote:
Hi
If I understand correctly
barplot(rbind(table(x), table(y)), beside=T)
does what you want.
Cheers
Petr
On 18 Feb 2005 at 7:51, T Petersen wrote:
Almost. Catagories aren't stacked - I would like to see that x has 2
instances of "1" while y has 1 instance of "1". What's more, there
are>now TWO distinct barplots - the left one shows x, while the right
one>shows y. I could live with that, but what I'd ideally want is to
have>x and y beside each other for EACH catagory - so for catagory
"1" you>could see taht there are more x's than y's (two x's versus
one y). But>thanks for the help
Mulholland, Tom wrote:
barplot(matrix(c(x,y),ncol = 2),beside=T)
Does this help
?barplot notes
height: either a vector or matrix of values describing the bars
which>> make up the plot. If 'height' is a vector, the plot
consists of a sequence of rectangular bars with heights
given by the values in the vector. If 'height' is a
matrix>> and 'beside' is 'FALSE' then each bar of the plot
corresponds to a column of 'height', with the values in
the>> column giving the heights of stacked "sub-bars" making
up>> the bar. If 'height' is a matrix and 'beside' is
'TRUE',>> then the values in each column are juxtaposed
rather than>> stacked.
-----Original Message-----
From: T Petersen [mailto:[EMAIL PROTECTED]
Sent: Friday, 18 February 2005 1:35 PM
To: Kevin Wang
Cc: [email protected]
Subject: Re: [R] Barplot - Can't figure it out
Ups, it should of course be barplot() in my mail, not boxplot:-)
Kevin Wang wrote:
Hi,
T Petersen wrote:
Hi,
I have two catagorical vectors like this;
x = c(1, 2, 4, 2, 1)
y = c(2, 4, 2 ,4, 1)
I want to set up a barplot with the catagories 1-4
horizontally and
number of occurances vertically for each vector x,y. I've tried
boxplot(table(x,y), beside=T)
and
boxplot(c(x,y), beside=T)
Have you tried barplot(), instead of boxplot()???
Cheers,
Kev
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Petr Pikal
[EMAIL PROTECTED]
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