Hi,

You can use function segments() to draw them.


Regards,
Carlos Ortega
www.qualityexcellence.es

2011/11/1 Wendy <wendy2.qiao@gmail.com>

> Hi all,
>
> I want to make a histogram like the one show
> http://nar.oxfordjournals.org/content/39/suppl_1/D1011/F1.expansion.html
> here , but I did not figure out how to add the red marks at the bottom of
> the bars. Could anybody help? Thank you very much
>
> --
> View this message in context:
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