pb with figure + colormap

Hello,

i draw some rectangle (with PolyCollection) on one figure. I’d like to put

around (on the right vertical, or at the bottom horizontal) a colormap with the

min and max values (as in

http://matplotlib.sourceforge.net/examples/pylab_examples/colorbar_tick_labelling_demo.html
)

Here is a part of my code

c = collections.PolyCollection(list_rect)

c.set_array(liste_colormap)

c.set_cmap(cm.hot)

fig = plt.figure(figsize=(16, 12))

ax = fig.add_subplot(111)

ax.add_collection©

ax.set_xlim(xorig, xmax)

ax.set_ylim(yorig, ymax)

ax.set_yticks((ymax/6, (ymax/6)*3, (ymax/6)*5))

ax.set_yticklabels((‘Rangee 1’, ‘Rangee 2’,‘Rangee 3’))

plt.title(str(num_semaine)+"-"+str(annee))

cmap=cmap,norm=norm,orientation=‘horizontal’)

plt.colorbar(cax=c, ax=ax)

plt.plot()

plt.savefig(“s”+str(num_semaine)+"-"+str(annee)+".png")

At the end, there’s a message :

Traceback (most recent call last):

File “/…/graph4.1.2.py”, line 260, in

plt.colorbar(cax=c, ax=ax)

File “/usr/lib/python2.6/dist-packages/matplotlib/pyplot.py”, line 1326, in

colorbar

ret = gcf().colorbar(mappable, cax = cax, ax=ax, **kw)

File “/usr/lib/python2.6/dist-packages/matplotlib/figure.py”, line 1002, in

colorbar

cax.hold(True)

AttributeError: ‘PolyCollection’ object has no attribute ‘hold’

Any idea ??

Thank you.

···

######################################################################

Jean-Christophe Penalva

Centre Informatique National de l’Enseignement Superieur (CINES)

Montpellier, FRANCE

Tel : 33 4 67 141 414 Fax : 33 4 67 523 763

http://www.cines.fr/

Jean-Christophe Penalva wrote:

    Hello,

i draw some rectangle (with PolyCollection) on one figure. I'd like to put
around (on the right vertical, or at the bottom horizontal) a colormap with the
min and max values (as in
http://matplotlib.sourceforge.net/examples/pylab_examples/colorbar_tick_labelling_demo.html)

Here is a part of my code

...
c = collections.PolyCollection(list_rect)
c.set_array(liste_colormap)
c.set_cmap(cm.hot)

c is a PolyCollection instance

fig = plt.figure(figsize=(16, 12))
ax = fig.add_subplot(111)
ax.add_collection(c)
ax.set_xlim(xorig, xmax)
ax.set_ylim(yorig, ymax)
ax.set_yticks((ymax/6, (ymax/6)*3, (ymax/6)*5))
ax.set_yticklabels(('Rangee 1', 'Rangee 2','Rangee 3'))
plt.title(str(num_semaine)+"-"+str(annee))
cmap=cmap,norm=norm,orientation='horizontal')
plt.colorbar(cax=c, ax=ax)

but cax is looking for an axes instance in which to draw the colorbar. Try omitting that kwarg. The colorbar axes will be made automatically.

Eric

···

plt.plot()
plt.savefig("s"+str(num_semaine)+"-"+str(annee)+".png")

At the end, there's a message :
Traceback (most recent call last):
File "/.../graph4.1.2.py", line 260, in <module>
   plt.colorbar(cax=c, ax=ax)
File "/usr/lib/python2.6/dist-packages/matplotlib/pyplot.py", line 1326, in
colorbar
   ret = gcf().colorbar(mappable, cax = cax, ax=ax, **kw)
File "/usr/lib/python2.6/dist-packages/matplotlib/figure.py", line 1002, in
colorbar
    cax.hold(True)
AttributeError: 'PolyCollection' object has no attribute 'hold'

Any idea ??

Thank you.

######################################################################
Jean-Christophe Penalva
Centre Informatique National de l'Enseignement Superieur (CINES)
Montpellier, FRANCE
Tel : 33 4 67 141 414 Fax : 33 4 67 523 763
http://www.cines.fr/

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