Sourcing Archaeological Materials by Chemical Composition
Compute Summary Statistics of Data Subsets
Operations in the Simplex
Coerce to Amounts
Coerce to a Closed Compositional Matrix
Graph of Log-ratios
Barplot of Compositional Data
Combine Two Composition Matrices
Chemical Elements and Oxides
Closure Operation
Compositional Matrix
Compositional Mean of Data Subsets
Covariance Matrix
Data Description
Outlier Detection
Distances
Group-based Subset
Geometric Mean
Working With Groups
Histogram of Compositional Data
Logical Matrix
Log-Ratio Matrix
Mahalanobis Distance
Marginal Compositions
Compositional Mean
Missing Values Policy
Mixed-Mode Analysis
Get or Set Parts of an Object
nexus: Sourcing Archaeological Materials by Chemical Composition
Numeric Matrix
Outliers
Principal Components Analysis
Perturbation Operation
Proportionality Index of Parts (PIP)
Plot Log-Ratios
Plot Outliers
Plot Compositional Data
Powering Operation
Sample Quantiles
Objects exported from other packages
Missing Values Replacement
Zero-Replacement
Scalar Product
Scaling and Centering of Compositional Data
Divide into Groups
Extract or Replace Parts of an Object
Matrix Transpose
Row Sums
Additive Log-Ratios (ALR)
Centered Log-Ratios (CLR)
Isometric Log-Ratios (ILR)
Inverse Log-Ratio Transformation
Pairwise Log-Ratios (LR)
Pivot Log-Ratios (PLR)
Univariate Isometric Log-Ratios (ILR)
Total Variance
Log-Ratios Variances
Variation Matrix
Exploration and analysis of compositional data in the framework of Aitchison (1986, ISBN: 978-94-010-8324-9). This package provides tools for chemical fingerprinting and source tracking of ancient materials.
Useful links