snps.druguse {ExPosition}R Documentation

Small data set for Partial Least Squares-Correspondence Analysis


The data come from a larger study on marijuauna dependent individuals (see Filbey et al., 2009) and are illustrated in Beaton et al., 2013.
The data contain 2 genetic markers and 3 additional drug use questions from 50 marijuauna dependent individuals.




snps.druguse$DATA1: Fifty marijuana dependent participants indicated which, if any, other drugs they have ever used.
snps.druguse$DATA2: Fifty marijuana dependent participants were genotyped for the COMT and FAAH genes.


In snps.druguse$DATA1:
e - Stands for ecstacy use. Responses are yes or no. cc - Stands for crack/cocaine use. Responses are yes or no. cm - Stands for crystal meth use. Responses are yes or no.
In snps.druguse$DATA2:
COMT - Stands for the COMT gene. Alleles are AA, AG, or GG. Some values are NA. FAAH - Stands for FAAH gene. Alleles are AA, CA, CC. Some values are NA.


Filbey, F. M., Schacht, J. P., Myers, U. S., Chavez, R. S., & Hutchison, K. E. (2009). Marijuana craving in the brain. Proceedings of the National Academy of Sciences, 106(31), 13016 – 13021.

Beaton D., Filbey F. M., Abdi H. (2013, in press). Integrating Partial Least Squares Correlation and Correspondence Analysis for Nominal Data. In Abdi H, Chin W, Esposito-Vinzi V, Russolillo G, Trinchera L. Proceedings in Mathematics and Statistics (Vol. 56): New Perspectives in Partial Least Squares and Related Methods. New York, NY: Springer-Verlag.

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