[R] Side by Side Barplot Newbie Question

[John Kane]

I think your data is set up incorrectly.  
With your data below as "xx" try this. 

# Dotcharts are often better than barplots so you might want to 
# try this


================================================================
library(reshape)
mm <- melt(xx, id=c(1:2)); mm
bb <- as.matrix(cast(mm, tt ~ task, sum))
barplot(bb, beside=TRUE, col=rainbow(4))
legend("topleft", legend=row.names(bb), text.col=rainbow(4))
================================================================
# Dotcharts are often better than barplots so you might want to 
# try this in place of a barplot.

dotchart(bb, col=rainbow(4))
=================================================================
--- On Wed, 7/29/09, Brindha Selvaraj <brindharhelp at gmail.com> wrote:

> From: Brindha Selvaraj <brindharhelp at gmail.com>
> Subject: [R] Side by Side Barplot Newbie Question
> To: r-help at r-project.org
> Received: Wednesday, July 29, 2009, 1:48 PM
> Hi,
> 
> Many apologies for sending this twice.  I accidentally
> hit the send button
> before I finished writing my mail. I am new to R and 
> I hope someone can
> help me with my problem. I am trying to draw a side by side
> barplot.
> 
> There is a main experiment and there are many sub
> experiments within the
> main experiment. I would like to draw a bar plot showing
> the number and type
> of sub_experiments done for each main_exp.  For
> instance if the Main_Exp is
> 6, I would like to group the sub exp's for the main_exp and
> show that there
> were two sub_exp's done an ELISA and a FCM and that the
> ELISA was done once
> and the FCM was done twice.  Similarly for Main_Exp 7
> I would like to show
> that for there were ELISA,FCM,qPCR,Telometry done and that
> they had a count
> of 3,3,2,5 respectively. This is what my dataset looks
> like:
> 
> Main_Exp_Name     Sub_Exp_Name 
> Sub_Exp_Count
> 1               
>             ELISA   
>              2
> 6               
>             ELISA   
>              1
> 6               
>          
>    FCM         
>          2
> 7               
>          
>    ELISA         
>        3
> 7               
>          
>    FCM         
>          3
> 7               
>          
>    Telometry       
>     2
> 7               
>          
>    qPCR         
>         5
> 
> The code that I have is
> 
> table(comparisons_new)
> barplot(as.matrix(comparisons_new$Sub_Exp_Count),xlab="Main_Exp_Name",
> ylab="Sub_Exp_Count",ylim=c(0,10),names.arg=(comparisons_new$Main_Exp_Name),beside=TRUE,legend=rownames(comparisons_new$Sub_Exp_Name),col=rainbow(5))
> 
> With this code, I am able to draw the barplot, but am
> having issues:
> 
> I am not able to group them together.  That is for
> each Main_Exp I am not
> able to group the Sub_Exp's under it. It all shows up as
> one continuous
> barplot without any spaces in between the Main_Exp's.
> 
> Also, I would like to be able to use the same colour for a
> particular
> sub_Exp_Name no matter in which ever Main_Exp it may show
> up.  But, this is
> not working for me.
> 
> Please help,
> 
> Brinda
> 
>     [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org
> mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained,
> reproducible code.
> 


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