Aitchison Examples

pyrolite includes four synthetic datasets which are used in [Aitchison1984] which can be accessed using each of the respective functions load_boxite(), load_coxite(), load_hongite() and load_kongite() (all returning a DataFrame).

from pyrolite.data.Aitchison import load_boxite, load_coxite, load_hongite, load_kongite

df = load_boxite()
df.head()

	A	B	C	D	E	Depth
Specimen
B1	43.5	25.1	14.7	10.0	6.7	1
B2	41.1	27.5	13.9	9.5	8.0	2
B3	41.5	20.1	20.6	11.1	6.7	3
B4	33.9	37.8	11.1	11.5	5.7	4
B5	46.5	16.0	15.6	14.3	7.6	5

import matplotlib.pyplot as plt

import pyrolite.plot

fig, ax = plt.subplots(1)
for loader in [load_boxite, load_coxite, load_hongite, load_kongite]:
    df = loader()
    ax = df[["A", "B", "C"]].pyroplot.scatter(ax=ax, label=df.attrs["name"])

ax.legend()
plt.show()

References

[Aitchison1984]

Aitchison, J., 1984. The statistical analysis of geochemical compositions. Journal of the International Association for Mathematical Geology 16, 531–564. doi: 10.1007/BF01029316

See also

Examples:

Log Ratio Means, Log Transforms, Compositional Data, Ternary Plots

Tutorials:

Ternary Density Plots, Making the Logo

Modules and Functions:

pyrolite.comp.codata, renormalise()