Journal of Mammalian Evolution

, Volume 23, Issue 4, pp 397–412 | Cite as

Introducing molaR: a New R Package for Quantitative Topographic Analysis of Teeth (and Other Topographic Surfaces)

  • James D. Pampush
  • Julia M. Winchester
  • Paul E. Morse
  • Alexander Q. Vining
  • Doug M. Boyer
  • Richard F. Kay
Original Paper

Abstract

Researchers studying mammalian dentitions from functional and adaptive perspectives increasingly have moved towards using dental topography measures that can be estimated from 3D surface scans, which do not require identification of specific homologous landmarks. Here we present molaR, a new R package designed to assist researchers in calculating four commonly used topographic measures: Dirichlet Normal Energy (DNE), Relief Index (RFI), Orientation Patch Count (OPC), and Orientation Patch Count Rotated (OPCR) from surface scans of teeth, enabling a unified application of these informative new metrics. In addition to providing topographic measuring tools, molaR has complimentary plotting functions enabling highly customizable visualization of results. This article gives a detailed description of the DNE measure, walks researchers through installing, operating, and troubleshooting molaR and its functions, and gives an example of a simple comparison that measured teeth of the primates Alouatta and Pithecia in molaR and other available software packages. molaR is a free and open source software extension, which can be found at the doi:10.13140/RG.2.1.3563.4961 (molaR v. 2.0) as well as on the Internet repository CRAN, which stores R packages.

Keywords

Dirichlet Normal Energy Relief Index Orientation Patch Count Plotting functions 

Supplementary material

10914_2016_9326_MOESM1_ESM.xls (72 kb)
ESM 1(XLS 72 kb)

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • James D. Pampush
    • 1
  • Julia M. Winchester
    • 2
  • Paul E. Morse
    • 3
  • Alexander Q. Vining
    • 1
  • Doug M. Boyer
    • 1
  • Richard F. Kay
    • 1
  1. 1.Department of Evolutionary AnthropologyDuke UniversityDurhamUSA
  2. 2.Interdepartmental Doctoral Program in Anthropological SciencesStony Brook UniversityStony BrookUSA
  3. 3.Department of AnthropologyUniversity of FloridaGainesvilleUSA

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