Fig. 4
From: Assessing the quality of Smilacis Glabrae Rhizoma (Tufuling) by colormetrics and UPLC-Q-TOF-MS
Division of the samples into two classes using hierarchical analysis; CLA and CLB, based on color; and CHA and CHB, based on chemical composition. A multiple regression model was established in color space based on our regression analysis of the color data. a Cluster dendrogram of the different colors. b Cluster dendrogram constructed from the EIC peak areas of the 43 SGR samples. c Regression model of SGR into the RGB color space and the standard tape of the SGR samples