code: def plot():
      fig, ax = plt.subplots()
      img = ax.imshow(emission.T)
      ax.set_title("Frame-wise class probability")
      ax.set_xlabel("Time")
      ax.set_ylabel("Labels")
      fig.colorbar(img, ax=ax, shrink=0.6, location="bottom")
      fig.tight_layout()
  
file_path: audio/examples/tutorials/forced_alignment_tutorial.py
imports: import torch
  import torchaudio
  from dataclasses import dataclass
  import IPython
  import matplotlib.pyplot
label_desc: Use image node_id 1 for calling a global function with example usage: plot() without return types