Plotting data as bars with a date axis?

The standard plot:

ax.plot_date(dates,values)
does a "dot" plot

whereas

ax.plot_date(dates,values,'-')
plots a line.

How, though, do I plot values as bars?

Thanks
Derek

PS dates are converted from an array "dates as strings",
using the datestr2num() - which works well!

···

--
This message is subject to the CSIR's copyright, terms and conditions and
e-mail legal notice. Views expressed herein do not necessarily represent the
views of the CSIR.

CSIR E-mail Legal Notice
http://mail.csir.co.za/CSIR_eMail_Legal_Notice.html

CSIR Copyright, Terms and Conditions
http://mail.csir.co.za/CSIR_Copyright.html

For electronic copies of the CSIR Copyright, Terms and Conditions and the CSIR
Legal Notice send a blank message with REQUEST LEGAL in the subject line to
CallCentre@...1230...

This message has been scanned for viruses and dangerous content by MailScanner,
and is believed to be clean.