[R-sig-teaching] adding plus/minus 1 standard devaition into each bar in cluster bar chart

[Hadley Wickham]

Before doing that, I'd highly recommend reading
http://biostat.mc.vanderbilt.edu/twiki/pub/Main/TatsukiRcode/Poster3.pdf

Hadley

On Sat, Dec 11, 2010 at 8:43 AM, Ali Zanaty <zanaty2005 at yahoo.com> wrote:
> Dear All R users:
>
> I hope that this message finds all of you well.
>
> Currently, I am teaching an undergraduate course in statistics.
>
> If possible, Could you please help me out how to add plus/minus 1 standard
> deviation added to each bar into R cluster bar chart.
>
> You can use the following artificial data.
>
> data cat 1 cat 2
> 23     1      1
> 45     1      1
> 34     1      1
> 5      1      1
> 32     1      1
> 44     1      1
> 3      2      1
> 1      2      1
> 2      2      1
> 3      2      1
> 4      2      1
> 5      1      2
> 6      1      2
> 7      1      2
> 8      1      2
> 544    2      2
> 78     2      2
> 543    2      2
> 34     2      2
> 89     2      2
> 9      1      3
> 43     1      3
> 23     1      3
> 45     1      3
> 7      1      3
> 5      1      3
> 7      1      3
> 6      2      3
> 867    2      3
> 3      2      3
> 4      2      3
> 5      2      3
> 6      2      3
> 7      2      3
> 8      2      3
> 9      2      3
>
> I need to create a bar chart for the mean of data column for each category. I
> know how to create the cluster bar chart. But I need your help with how to add
> plus/minus 1 standard deviation into each bar.
>
> Thank you so much for your helps and for your attention to this matter, and I
> look forward to hearing from you.
>
>
> Regards,
>
> zanaty
>
>
>
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>
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-- 
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/