Fig. 3: Distribution maps of major oxide contents and principal component analysis (PCA) of samples from Yingou site and Yaozhou kiln. | npj Heritage Science

Fig. 3: Distribution maps of major oxide contents and principal component analysis (PCA) of samples from Yingou site and Yaozhou kiln.

From: Provenance study of Tang-dynasty black-glazed porcelains unearthed at the Yingou site

Fig. 3

Box plots of major oxide contents in the bodies of the Yingou (T-YG) and Yaozhou (T-YZY) samples. PCA score plot based on the selected major oxides showing the compositional relationship between groups. Symbols/colors distinguishing T-YG and T-YZY are as indicated in the figure; box plots show median, interquartilerange, and whiskers.

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