Fig. 2
Chromatographic fingerprints and cluster analysis based on the 10 batches of the different extraction of ganjiang decoction. The fingerprint of the extract obtained by the first (a), second (b), third (c), fourth (d), and fifth (e) extraction method of ganjiang decoction. Scatter diagram was plotted according to the retention time and peak area of common peaks (f). Cluster analysis was performed according to the peak area of the common peak, and the height of peak area was expressed by heat map (g)