visualization/tsne_vis.py

   1 import pyarrow
   2 import altair as alt
   3 alt.data_transformers.disable_max_rows()
   4 alt.data_transformers.enable('data_server')
   5 import pandas as pd
   6 from numpy import random
   7 import numpy as np
   8 from sklearn.manifold import TSNE
   9
  10 df = pd.read_csv("reddit_term_similarity_3000.csv")
  11 df = df.sort_values(['i','j'])
  12
  13 n = max(df.i.max(),df.j.max())
  14
  15 def zero_pad(grp):
  16     p = grp.shape[0]
  17     grp = grp.sort_values('j')
  18     return np.concatenate([np.zeros(n-p),np.zeros(1),np.array(grp.value)])
  19
  20 col_names = df.sort_values('j').loc[:,['subreddit_j']].drop_duplicates()
  21 first_name = list(set(df.subreddit_i) - set(df.subreddit_j))[0]
  22 col_names = [first_name] + list(col_names.subreddit_j)
  23 mat = df.groupby('i').apply(zero_pad)
  24 mat.loc[n] = np.concatenate([np.zeros(n),np.ones(1)])
  25 mat = np.stack(mat)
  26
  27 # plot the matrix using the first and second eigenvalues
  28 mat = mat + np.tril(mat.transpose(),k=-1)
  29
  30 tsne_model = TSNE(2,learning_rate=500,perplexity=40,n_iter=2000)
  31 tsne_fit_model = tsne_model.fit(mat)
  32 tsne_fit_whole = tsne_fit_model.fit_transform(mat)
  33
  34 plot_data = pd.DataFrame({'x':tsne_fit_whole[:,0],'y':tsne_fit_whole[:,1], 'subreddit':col_names})
  35
  36 plot_data.to_feather("tsne_subreddit_fit.feather")
  37
  38 slider = alt.binding_range(min=1,max=100,step=1,name='zoom: ')
  39 selector = alt.selection_single(name='zoomselect',fields=['zoom'],bind='scales',init={'zoom':1})
  40
  41 xrange = plot_data.x.max()-plot_data.x.min()
  42 yrange = plot_data.y.max()-plot_data.y.min()
  43
  44 chart = alt.Chart(plot_data).mark_text().encode(
  45     alt.X('x',axis=alt.Axis(grid=False)),
  46     alt.Y('y',axis=alt.Axis(grid=False)),
  47     text='subreddit')
  48
  49 #chart = chart.add_selection(selector)
  50
  51 chart = chart.configure_view(
  52     continuousHeight=xrange/20,
  53     continuousWidth=yrange/20
  54 )
  55
  56 amount_shown = lambda zoom: {'width':xrange/zoom,'height':yrange/zoom}
  57
  58 alt.data_transformers.enable('default')
  59 chart = chart.properties(width=1000,height=1000)
  60 chart = chart.interactive()
  61 chart.save("test_tsne_whole.html")
  62 chart = chart.properties(width=10000,height=10000)
  63 chart.save("test_tsne_whole.svg")