Re: [Matplotlib-users] error bar and arrays (tuple way to solve a problem)

[Eric F. <ef...@ha...>]

Again, the problem with the sample you supply is that you are making 2-D 
arrays where what you need are 1-D arrays.  Simply flattening y and pred 
before using them makes the script work fine, as attached.  Or make them 
1-D in the first place.

Eric

Giorgio Luciano wrote:
> Thanks to all for the replies :)
> I used a tuple to solve the problem because I dind't manage to reshape 
> my array since it comes from a previous slicing, but not it seems to work.
> Is it the same problem because this doesn't work ?
> 
> from pylab import *
> y=array([[ 1.02], [ 1.05], [ 1.03], [ 0.99], [ 0.97], [ 0.95], [ 1.  ], 
> [ 0.93],  [ 1.  ], [ 1.  ], [ 0.98], [ 0.98], [ 0.94],  [ 0.94],  [ 
> 0.96],  [ 0.92],  [ 1.01],  [ 0.96], [ 0.99], [ 0.96], [ 1.03],  [ 
> 0.91],    [ 0.99], [ 0.98], [ 1.  ], [ 0.98], [ 0.96]])
> pred=array([[ 1.02875   ], [ 1.03125   ], [ 1.02291667], [ 0.99541667], 
> [ 0.96458333], [ 0.93625   ], [ 0.99375   ], [ 0.93708333], [ 1.00125   
> ],  [ 1.01875   ], [ 0.98541667],  [ 0.97291667],
>        [ 0.94708333],  [ 0.93458333],  [ 0.96625   ],   [ 0.92375   ],  
> [ 1.005     ], [ 0.965     ], [ 0.98333333], [ 0.96666667], [ 
> 1.02666667], [ 0.91333333],  [ 1.005     ],  [ 0.965     ], [ 0.98      ],
>        [ 0.98      ], [ 0.98      ]])
> figure(2)
> r=27
> p2=plot(y,pred,'bo')
> t1=arange(1,r+1)
> for t1 in arange(1,r+1):
>    text(y[t1-1], pred[t1-1], str(t1))
> show()
> ######  End Plot 2
> 
> and gives this error ??Exception in Tkinter callback
> Traceback (most recent call last):
>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 1345, in __call__
>     return self.func(*args)
>   File 
> "C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py", 
> line 151, in resize
>     self.show()
>   File 
> "C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py", 
> line 154, in draw
>     FigureCanvasAgg.draw(self)
>   File 
> "C:\Python24\Lib\site-packages\matplotlib\backends\backend_agg.py", line 
> 392, in draw
>     self.figure.draw(renderer)
>   File "C:\Python24\Lib\site-packages\matplotlib\figure.py", line 545, 
> in draw
>     for a in self.axes: a.draw(renderer)
>   File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 1067, in 
> draw
>     a.draw(renderer)
>   File "C:\Python24\Lib\site-packages\matplotlib\text.py", line 340, in draw
>     bbox, info = self._get_layout(renderer)
>   File "C:\Python24\Lib\site-packages\matplotlib\text.py", line 168, in 
> _get_layout
>     if self.cached.has_key(key): return self.cached[key]
> TypeError: unhashable type
> 
> Thanks to all community :)
> Giorgio