horizontal colorbar pb

Hi,

so the scripts to see my problem with the colorbar are:

script 1:

from pylab import *
from numarray import *

a = arange(10)

scatter(a,a,c=a,s=60,cmap=cm.winter)
colorbar(orientation='horizontal')
show()

script 2:

from pylab import *
from numarray import *

a = arange(10)

scatter(a,a,c=a,s=60,cmap=cm.winter)
colorbar()
show()

The first script must have (I think) a scale for the colorbar between 0 and 10 like it is in the vertical mode but it's only a guess and I probably misunderstood something else.

Thanks,

    N.