From: Nathan TeBlunthuis Date: Thu, 12 Nov 2020 00:05:36 +0000 (-0800) Subject: Add file to plot related subreddits using tsne. X-Git-Url: https://code.communitydata.science/cdsc_reddit.git/commitdiff_plain/db53c0138ae36d4b8f75b101315651a259a89dd8?ds=sidebyside Add file to plot related subreddits using tsne. --- diff --git a/visualization/tsne_vis.py b/visualization/tsne_vis.py new file mode 100644 index 0000000..ca3da3b --- /dev/null +++ b/visualization/tsne_vis.py @@ -0,0 +1,63 @@ +import pyarrow +import altair as alt +alt.data_transformers.disable_max_rows() +alt.data_transformers.enable('data_server') +import pandas as pd +from numpy import random +import numpy as np +from sklearn.manifold import TSNE + +df = pd.read_csv("reddit_term_similarity_3000.csv") +df = df.sort_values(['i','j']) + +n = max(df.i.max(),df.j.max()) + +def zero_pad(grp): + p = grp.shape[0] + grp = grp.sort_values('j') + return np.concatenate([np.zeros(n-p),np.zeros(1),np.array(grp.value)]) + +col_names = df.sort_values('j').loc[:,['subreddit_j']].drop_duplicates() +first_name = list(set(df.subreddit_i) - set(df.subreddit_j))[0] +col_names = [first_name] + list(col_names.subreddit_j) +mat = df.groupby('i').apply(zero_pad) +mat.loc[n] = np.concatenate([np.zeros(n),np.ones(1)]) +mat = np.stack(mat) + +# plot the matrix using the first and second eigenvalues +mat = mat + np.tril(mat.transpose(),k=-1) + +tsne_model = TSNE(2,learning_rate=500,perplexity=40,n_iter=2000) +tsne_fit_model = tsne_model.fit(mat) +tsne_fit_whole = tsne_fit_model.fit_transform(mat) + +plot_data = pd.DataFrame({'x':tsne_fit_whole[:,0],'y':tsne_fit_whole[:,1], 'subreddit':col_names}) + +plot_data.to_feather("tsne_subreddit_fit.feather") + +slider = alt.binding_range(min=1,max=100,step=1,name='zoom: ') +selector = alt.selection_single(name='zoomselect',fields=['zoom'],bind='scales',init={'zoom':1}) + +xrange = plot_data.x.max()-plot_data.x.min() +yrange = plot_data.y.max()-plot_data.y.min() + +chart = alt.Chart(plot_data).mark_text().encode( + alt.X('x',axis=alt.Axis(grid=False)), + alt.Y('y',axis=alt.Axis(grid=False)), + text='subreddit') + +#chart = chart.add_selection(selector) + +chart = chart.configure_view( + continuousHeight=xrange/20, + continuousWidth=yrange/20 +) + +amount_shown = lambda zoom: {'width':xrange/zoom,'height':yrange/zoom} + +alt.data_transformers.enable('default') +chart = chart.properties(width=1000,height=1000) +chart = chart.interactive() +chart.save("test_tsne_whole.html") +chart = chart.properties(width=10000,height=10000) +chart.save("test_tsne_whole.svg")