R help - Jun 2010 - how to make a barplot similar to Excel’s “clustered column chart”.

I have a matrix with 12 rows (one for each month), 2 columns (baseflow, 
runoff). I would like to make a barplot similar to Excel’s “clustered 
column chart”. 
 Here is my matrix ‘x’
 
8.258754        13.300710
10.180953       10.760465
11.012184       13.954887
10.910870       13.839839
9.023519        11.511129
7.189241        12.519830
5.925576        17.101491
5.211613        13.585175
5.039592        13.506304
4.462325        9.963006
5.586521        11.306202
7.739242        14.669374

If I use barplot(x, beside=T), column 1 appears on the left side of the 
plot, and then column 2 appears on the right side of the plot.  I would 
rather that they alternate, so that for month 1, I see 2 bars – column 1, 
then column 2.  And so forth for months 2-12. Is there a simple way to do 
this?  (In excel this is the chart option for “clustered column”)



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Josef.Kardos at phila.gov wrote:
> I have a matrix with 12 rows (one for each month), 2 columns (baseflow, 
> runoff). I would like to make a barplot similar to Excel???s ???clustered 
> column chart???. 
>  Here is my matrix ???x???
>  
> 8.258754        13.300710
> 10.180953       10.760465
> 11.012184       13.954887
> 10.910870       13.839839
> 9.023519        11.511129
> 7.189241        12.519830
> 5.925576        17.101491
> 5.211613        13.585175
> 5.039592        13.506304
> 4.462325        9.963006
> 5.586521        11.306202
> 7.739242        14.669374
> 
> If I use barplot(x, beside=T), column 1 appears on the left side of the 
> plot, and then column 2 appears on the right side of the plot.  I would 
> rather that they alternate, so that for month 1, I see 2 bars ??? column 1,
> then column 2.  And so forth for months 2-12. Is there a simple way to do 
> this?  (In excel this is the chart option for ???clustered column???)
Can't you just transpose x? barplot(t(x), beside=T)

-- 
Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

Josef,

I think all you need to do is use the transpose of your data matrix. So if
your dataset is called mydata:

barplot(t(as.matrix(x)),beside=T)

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