Dataset: muralpaint_chem.csv

Source: M. Sanchez del Rio, P. Martinetto, C. Solis, C. Reyes-Valero (2006).
"PIXE Analysis on Maya Blue in Prehispanic and Colonial Mural Paintings,"
Nuclear Instruments and Methods in Physics Research B, Vol. 249, pp. 628-632.

Description: Partice induced X-ray emission (PIXE) analysis of 35 mural
paintings for chemical concentration (%) for 17 chemical elements. 
Murals were from 3 site types: 1=Prehispanic, 2=Colonial, 3=CEC.
Principal Components Analysis was run.

Variable Names
sampleID
siteType
Na
Mg
Al
Si
Cl
K
Ca
Fe
P
Ti
Mn
Ni 
Cu
Zn
Sr
Pb