Try escaping the &. On 03/12/2016 02:57 PM, Raphael C wrote: > The code snippet should have been > > > reg = DecisionTreeRegressor(max_depth=None,min_samples_split=1) > reg.fit(X,Y) > scores = cross_val_score(reg, X, Y) > print scores > dot_data = StringIO() > tree.export_graphviz(reg, out_file=dot_data, > feature_names=feature_names, > filled=True, rounded=True, > special_characters=True) > graph = pydot.graph_from_dot_data(dot_data.getvalue()) > Image(graph.create_png() > > Raphael > > On 12 March 2016 at 13:56, Raphael C <drr...@gmail.com> wrote: >> I am attempting to draw a decision tree using: >> >> reg = DecisionTreeRegressor(max_depth=None,min_samples_split=1) >> reg.fit(X,Y) >> dot_data = StringIO() >> tree.export_graphviz(reg, out_file=dot_data, >> feature_names=feature_names, >> filled=True, rounded=True, >> special_characters=True) >> graph = pydot.graph_from_dot >> >> >> This gives me the error message >> >> >> File "/usr/lib/python2.7/dist-packages/pydot.py", line 1802, in <lambda> >> lambda f=frmt, prog=self.prog : self.create(format=f, prog=prog)) >> File "/usr/lib/python2.7/dist-packages/pydot.py", line 2023, in create >> status, stderr_output) ) >> pydot.InvocationException: Program terminated with status: 1. stderr >> follows: Error: not well-formed (invalid token) in line 1 >> ... <HTML>Design & Tech. 3D Design=A ≤ 0.5 ... >> in label of node 17 >> Error: not well-formed (invalid token) in line 1 >> ... <HTML>Design & Tech. Product Design=A ≤ 0.5 ... >> in label of node 68 >> >> >> Is this because there is some restriction on the types of strings that >> are supported as feature names? >> >> Two of the feature names are: >> >> 'Design & Tech. 3D Design=A' >> >> and >> >> 'Design & Tech. Product Design=A' >> >> Raphael > ------------------------------------------------------------------------------ > Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > _______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
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