Merge pull request kaldi-asr#4851 from BaffinLee/fix/fix-gop-visualize-error

[egs] convert tuple to NDArray before call sklearn.manifold.TSNE

Author: danpovey

egs/gop_speechocean762/s5/local/visualize_feats.py

@@ -8,6 +8,7 @@
 import random
 import kaldi_io
 import seaborn as sns
+import numpy as np
 from collections import Counter
 from sklearn.manifold import TSNE
 from utils import load_human_scores, load_phone_symbol_table
@@ -62,6 +63,9 @@ def main():
                                   min(args.samples, len(lables)))
     features, lables = list(zip(*sampled_paris))
 
+    # Convert the tuple of arrays to a single 2D array
+    features = np.vstack(features)
+
     # Draw scatters
     label_counter = Counter(lables)
     colors = sns.color_palette("colorblind", len(label_counter))