[Matplotlib-users] Bar plot choose colours

[questions a. <que...@gm...>]

I have calculated annual temperature anomaly and I would like to plot as a
bar plot with all values positive make red and all values negative make blue

I am using pandas and the time series data in this example are called
'anomaly'

mybarplot=anomaly.plot(kind='bar')

the data look like this:

time
2003-01-01   -0.370800
2004-01-01   -0.498199
2005-01-01    0.246118
2006-01-01   -0.313321
2007-01-01    0.585050
2008-01-01   -0.227976
2009-01-01    0.439337
2010-01-01    0.135607
2011-01-01    0.106105
2012-01-01   -0.102002
Freq: AS-JAN, dtype: float64

is there some simple way of writing:
meantempanomaly.plot(kind='bar', anomaly>0:'r', anomaly<0:'b' )

Any feedback will be greatly appreciated