matplotlib-users Mailing List for matplotlib

On Sat, 3 Jul 2004, John Hunter wrote:
> Make that
> 
> l = Legend(self, handles, labels, loc)
> 
> Should work - let me know if you have any more troubles.
> 
Thanks John...i did actually try that before i sent my
previous email...sorry that the error messages were buried 
under a bunch of other stuff. I did have a problem after 
i added the self. Here is what i get (my hacked up legendDemp.py follows 
the error messages):
floyd:/home/jbenson/python>python legendDemo.py
Traceback (most recent call last):
 File "legendDemo.py", line 30, in ?
 'upper left')
 File "/usr/local/lib/python2.3/site-packages/matplotlib/figure.py", line 
179, in legend
 l = Legend(self, handles, labels, loc)
 File "/usr/local/lib/python2.3/site-packages/matplotlib/legend.py", line 
107, in __init__
 self._texts = self._get_texts(labels, textleft, upper)
 File "/usr/local/lib/python2.3/site-packages/matplotlib/legend.py", line 
215, in _get_texts
 HEIGHT = self._approx_text_height()
 File "/usr/local/lib/python2.3/site-packages/matplotlib/legend.py", line 
126, in _approx_text_height
 return 
self.FONTSIZE/72.0*self.figure.dpi.get()/self.parent.bbox.height()
AttributeError: 'NoneType' object has no attribute 'dpi'
floyd:/home/jbenson/python>
 
# legendDemo.py
 
from matplotlib.matlab import *
 
a = arange(0,3,.02)
b = arange(0,3,.02)
c=exp(a)
d=c.tolist()
d.reverse()
d = array(d)
 
ax = subplot(111)
lines = plot(a,c,'k--',a,d,'k:',a,c+d,'k')
 
bNotHacked = False
 
if bNotHacked:
 
 legend(('Model length', 'Data length', 'Total message length'), 'upper 
left')
 
else:
 
 fig = gcf()
 
 line1 = lines[0]
 line2 = lines[1]
 line3 = lines[2]
 
 fig.legend((line1, line2, line3),
 ('Model length', 'Data length', 'Total message length'),
 'upper left')
 
ax.set_ylim([-1,20])
ax.grid(0)
xlabel('Model complexity --->')
ylabel('Message length --->')
title('Minimum Message Length')
set(gca(), 'yticklabels', [])
set(gca(), 'xticklabels', [])
 
savefig('legend_demo_small', dpi=60)
savefig('legend_demo_large', dpi=120)
 
show()
~
Jim