THATS IT! Thanks! But why are all the examples wrong? Maybe they changed the API?
Andi Tim Heaney wrote: > Andi Clemens <[EMAIL PROTECTED]> writes: >> everytime I try to plot a bar with matplotlib I get the following >> error message: >> Traceback (most recent call last): >> File "bar_stacked.py", line 13, in ? >> p1 = bar(ind, menMeans, width, color='r', yerr=womenStd) >> File "/usr/lib/python2.4/site-packages/matplotlib/pylab.py", line >> 1641, in bar >> ret = gca().bar(*args, **kwargs) >> File "/usr/lib/python2.4/site-packages/matplotlib/axes.py", line >> 2485, in bar >> xerr = asarray([xerr]*nbars, Float) >> File "/usr/lib/python2.4/site-packages/Numeric/Numeric.py", line >> 134, in asarray >> return multiarray.array(a, typecode, copy=0, savespace=savespace) >> TypeError: a float is required >> >> >> So I guess it has something to do with Numeric.py, but I can't figure >> out what the problem is. I tried to google but found nothing... >> >> Anyone has the same problem? I can plot all kinds of graphics with >> matplotlib, but the only type I'm interested in (bars) will not >> work. > > It looks like it doesn't like not having xerr set. The documentation > says > > xerr and yerr, if not None, will be used to generate errorbars on > the bar chart > > implying that if they are None (the default), then no errorbars will > be generated. But that doesn't seem to be the case. When I add an xerr > to both p1 and p2 > > p1 = bar(ind, menMeans, width, color='r', yerr=womenStd, > xerr=zeros(N)) > p2 = bar(ind, womenMeans, width, color='y', > bottom=menMeans, yerr=menStd, xerr=zeros(N)) > > I get the following bar chart > > http://img176.imageshack.us/my.php?image=imagenx6.png > > with no errors. > > Tim -- homepage: http://www.the-grudge.net ICQ: 9450091 Skype: thegrudge_2 Mozilla Thunderbird 1.5.0.5 Arch Linux -- http://mail.python.org/mailman/listinfo/python-list
