trait.variance: Calculate predicted trait variance.
In klvoje/allometry: Quantifying constraints on allometry

Description Usage Arguments Details Value Author(s) References

Calculate predicted trait variance.

1	trait.variance(allometry.object)

allo

an allometry object

Assuming a static allometry between trait size y and body size x with body size centered on its mean and a multivariate normal distribution of the parameters (intercept , slope , size), the variance in trait size, Var[y], can be expressed as a function of variation in the underlying parameters of the static allometry: Var[y] = Var[bx+a] = Var[a] + 2E[b]Cov[a,x] + (E[b]^2)Var[x] + Var[b]Var[x] + Cov[b,x]^2.

The predicted trait variance.

Kjetil L. Voje

Voje, K. L., Hansen, T. F., Egset, C. K., Bolstad, G. H., & Pélabon, C. (2014). Allometric constraints and the evolution of allometry. Evoluton 68:866–885.

klvoje/allometry documentation built on Jan. 2, 2021, 1:50 p.m.