fgl {MASS} | R Documentation |
The fgl
data frame has 214 rows and 10 columns.
It was collected by B. German on fragments of glass
collected in forensic work.
RI |
refractive index; more precisely the refractive index is 1.518xxxx.
The remaining 8 measurements are percentages by weight of oxides. |
Na |
sodium |
Mg |
manganese |
Al |
aluminium |
Si |
silicon |
K |
potassium |
Ca |
calcium |
Ba |
barium |
Fe |
iron |
type |
The fragments were originally classed into seven types, one of which
was absent in this dataset. The categories which occur are
window float glass (WinF : 70),
window non-float glass (WinNF : 76),
vehicle window glass (Veh : 17),
containers (Con : 13),
tableware (Tabl : 9) and
vehicle headlamps (Head : 29).
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This data frame contains the following columns: