error in chignolin_example

[roadhouse23]

Hello,
when I try to execute the svm_chignolin.py example, I got the following error:

"TypeError Traceback (most recent call last)
~/Scaricati/SML_CV-master/chignolin_example/svm_chignolin.py in ()
118 clr_plt = sns.color_palette("colorblind")
119 plot(clf.coef_.T,marker='o',c=clr_plt[2])
--> 120 vlines(14,-.15,0.15,linestyles='dashed')
121 vlines(50,-.15,0.15,linestyles='dashed')
122 ylim([-.15,0.15])

/opt/python/3/lib/python3.6/site-packages/matplotlib/pyplot.py in vlines(x, ymin, ymax, colors, linestyles, label, hold, data, **kwargs)
3652 try:
3653 ret = ax.vlines(x, ymin, ymax, colors=colors, linestyles=linestyles,
-> 3654 label=label, data=data, **kwargs)
3655 finally:
3656 ax._hold = washold

/opt/python/3/lib/python3.6/site-packages/matplotlib/init.py in inner(ax, *args, **kwargs)
1708 warnings.warn(msg % (label_namer, func.name),
1709 RuntimeWarning, stacklevel=2)
-> 1710 return func(ax, *args, **kwargs)
1711 pre_doc = inner.doc
1712 if pre_doc is None:

/opt/python/3/lib/python3.6/site-packages/matplotlib/axes/_axes.py in vlines(self, x, ymin, ymax, colors, linestyles, label, **kwargs)
1060 #print 'creating line collection'
1061 lines = mcoll.LineCollection(verts, colors=colors,
-> 1062 linestyles=linestyles, label=label)
1063 self.add_collection(lines, autolim=False)
1064 lines.update(kwargs)

/opt/python/3/lib/python3.6/site-packages/matplotlib/collections.py in init(self, segments, linewidths, colors, antialiaseds, linestyles, offsets, transOffset, norm, cmap, pickradius, zorder, facecolors, **kwargs)
1162 antialiaseds = (mpl.rcParams['lines.antialiased'],)
1163
-> 1164 colors = mcolors.to_rgba_array(colors)
1165
1166 Collection.init(

/opt/python/3/lib/python3.6/site-packages/matplotlib/colors.py in to_rgba_array(c, alpha)
206 # array has the wrong kind or shape, raise the error during one-at-a-time
207 # conversion.)
--> 208 if (isinstance(c, tuple(np.ndarray)) and c.dtype.kind in "if"
209 and c.ndim == 2 and c.shape[1] in [3, 4]):
210 if c.shape[1] == 3:

TypeError: 'type' object is not iterable"

Can you help to solve this?

Thank you!

[msultan]

hmm, can you try the following:

1). print out clf.coef_.T to see that there are a list of coefficient values there.

2). print out clr_plt to see that there are a list of styles there.

3). Try comment out the vlines to see if the error goes away.

This is a strange bug, and might be because matplotlib changed something in its APIs.

[roadhouse23]

Ok I solved by updating the matplotlib considering the latest version (2.2.2). Thank you Il giorno gio 9 ago 2018 alle ore 16:22 msultan <notifications@github.com> ha scritto:

…

hmm, can you try the following: 1). print out clf.coef_.T to see that there are a list of coefficient values there. 2). print out clr_plt to see that there are a list of styles there. 3). Try comment out the vlines to see if the error goes away. This is a strange bug, and might be because matplotlib changed something in its APIs. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#2 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AoQpz9JzYf4qKCa-MzHM9fKkGHnupUs6ks5uPEWUgaJpZM4V1ye-> .

[msultan]

closing now.