snakeHS: Snake Head Size and Regional Variation
In RRPP: Linear Model Evaluation with Randomized Residuals in a Permutation Procedure
snakeHS R Documentation
Snake Head Size and Regional Variation
Description
A data set containing variables for snake head size,
snout-to-vent-length, sex, and geographic information.
Details
These data were collected from prairie rattlesnakes (Crotalus viridis viridis),
from several geographic locations in the upper Midwest of the United States (Smith and
Collyer, 2008). Variables include a spatial measure of head size (HS),
snout-to-vent-length (SVL, cm), sex, and the site and region where 107
snakes were captured. These
data are suitable for demonstrating model selection in the book,
Permutational Biometry (Collyer & Adams, 2025).
References
Smith, M. T. and Collyer, M. L. (2008). The biology of rattlesnakes, chapter
Regional variation and sexual dimorphism in head form of the prairie
rattlesnake (Crotalus viridid viridis): Comparisons using new analytical techniques
and collection methods, pages 79–90. Loma Linda University Press.
Collyer, M. L., & Adams D. C. (2025). Permutational Biometry: Volume
1, Univariate Data. Iowa State University Digital Press. NOT YET PUBLISHED.
RRPP documentation built on July 7, 2026, 1:07 a.m.
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| snakeHS | R Documentation |
Snake Head Size and Regional Variation
Description
A data set containing variables for snake head size, snout-to-vent-length, sex, and geographic information.
Details
These data were collected from prairie rattlesnakes (Crotalus viridis viridis), from several geographic locations in the upper Midwest of the United States (Smith and Collyer, 2008). Variables include a spatial measure of head size (HS), snout-to-vent-length (SVL, cm), sex, and the site and region where 107 snakes were captured. These data are suitable for demonstrating model selection in the book, Permutational Biometry (Collyer & Adams, 2025).
References
Smith, M. T. and Collyer, M. L. (2008). The biology of rattlesnakes, chapter Regional variation and sexual dimorphism in head form of the prairie rattlesnake (Crotalus viridid viridis): Comparisons using new analytical techniques and collection methods, pages 79–90. Loma Linda University Press.
Collyer, M. L., & Adams D. C. (2025). Permutational Biometry: Volume 1, Univariate Data. Iowa State University Digital Press. NOT YET PUBLISHED.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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