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dhope-lab opened this issue Apr 28, 2018 · 3 comments
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Invalid Display Variable #11140

dhope-lab opened this issue Apr 28, 2018 · 3 comments

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@dhope-lab
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I'm running on a CentOS ( release 7.4.1708 ) Linux environment that is on a Linux-based HPC. Python version 2.7.

I'm running a script to visualize TF-IDF values using the Isomap algorithm ( incorporating sci-kit learns) and then using a 3D scatterplot to visualize possible relationships between tfidf values of a corpus. This has already been preprocessed. This is my code:

def Isomap(tfidf):
  jon = pd.read_csv(tfidf)
  le = preprocessing.LabelEncoder()
  tims = jon.apply(le.fit_transform)
  iso = manifold.Isomap(n_neighbors=2, n_components=3)
  john = iso.fit_transform(tims)
  fig = plt.figure(1)
  colors = ['red', 'yellow', 'green']
  ax = fig.add_subplot(111, projection='3d')
  ax.scatter(john[:,0], john[:,1],john[:,2],color=colors,alpha=.5) # x,y,z coord. jon 1-3 
  plt.title('Isomap of candiates')
  plt.xlabel('x')
  plt.ylabel('y')
  plt.show()
  plt.savefig('isomap.png')

However, the error code reads as so:

Traceback (most recent call last):
  File "MasterScript.py", line 157, in <module>
    Isomap('tfidf.txt')
  File "MasterScript.py", line 134, in Isomap
    fig = plt.figure(1)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/pyplot.py", line 535, in figure
    **kwargs)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 44, in new_figure_manager
    return new_figure_manager_given_figure(num, thisFig)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 51, in new_figure_manager_given_figure
    canvas = FigureCanvasQTAgg(figure)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 242, in __init__
    super(FigureCanvasQTAgg, self).__init__(figure=figure)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 66, in __init__
    super(FigureCanvasQTAggBase, self).__init__(figure=figure)
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5.py", line 236, in __init__
    _create_qApp()
  File "/util/common/python/anaconda-5.0.0/lib/python2.7/site-packages/matplotlib/backends/backend_qt5.py", line 144, in _create_qApp
    raise RuntimeError('Invalid DISPLAY variable')
RuntimeError: Invalid DISPLAY variable

I'm not exactly sure if it is a fault of matplotlib or my own handling of the library. Any help would be appreciated.
@jklymak
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jklymak commented Apr 28, 2018

This is not a user-help forum; google is your friend for errors like this.

@jklymak jklymak closed this as completed Apr 28, 2018
@WeatherGod
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WeatherGod commented Apr 28, 2018 via email

@tacaswell
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Duplicated of #3466

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@tacaswell @WeatherGod @jklymak @dhope-lab