『（Abstract）
Geochemical Data Toolkit (GCDkit) is a program for handling and
recalculation of geochemical data from igneous and metamorphic
rocks. It is built using the Windows version of R, which provides
a flexible and comprehensive language and environment for data
analysis and graphics. GCDkit was designed to eliminate routine
and tedious operations involving large collections of whole-rock
data and, at the same time, provide access to the wealth of statistical
functions built into R. Data management tools include import and
export of data files in a number of formats, data editing, searching,
grouping and generation of subsets. Included are a variety of
calculation and normative schemes, for instance CIPW and Mesonorm,
as are the common geochemical graphs (e.g. binary and ternary
graphs, Harker plots, spider plots, and several dozens of classification
and geotectonic discrimination diagrams). The graphical output
is publication ready but can be further retouched if required.
The system can be further expanded by means of plug-in modules
that provide specialist applications. GCDkit is available as Free
Software under the terms of the Free Software Foundation's GNU
General Public License and can be downloaded from http://www.gla.ac.uk/gcdkit.
The product is actively maintained and updated to provide additional
functionality; Unix/Linux and Mac OS versions are being developed.
Key words: igneous rocks; geochemistry; norms; graphs; software;
MS Windows; R language』
Introduction
The challenge: geochemical recalculations and plotting
The solution: Geochemical data toolkit (GCDkit)
Program description
Data management
Calculations
Plotting
Expandability
Concluding remarks
Acknowledgements
References