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3 results for “from:Frank Dziock”

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Partitioning variance with VarPart - permutation test on difference between fractions

Frank Dziock · Feb 3, 2009 · r-sig-ecology

Hi there! I am analyzing a dataset on hoverflies along an altitudinal gradient and I managed to partition the variance explained among four predictor variable sets (CLIMATE, RESOURCES, STRUCTURE, and SPACE) in R with varpart and tested the significance of...

Quantifying functional trait diversity through Gower distance and pcoa

Frank Dziock · Nov 16, 2010 · r-sig-ecology

Hi Chris, 1. an easy way to calculate Functional Diversity when you only have categorical trait data is to calculate Functional Richness as the number of unique trait combinations. This is what the FD package does for you automatically. 2...

grasshoppers and mixed models

Frank Dziock · Jan 28, 2009 · r-sig-mixed-models

Hi there! our response variable is the number of grasshoppers (abundance) on ski slopes/non ski study plots in alpine ecosystems. We are interested in the fixed effects of skiing, fertilization, management intensity and other properties of the study plots...

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