local_influence: Local Influence Diagnostics
In mixpoissonreg: Mixed Poisson Regression for Overdispersed Count Data

Description Usage Arguments Details Value References See Also

Local Influence Diagnostics

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local_influence(model, ...)

local_influence_plot(model, ...)

`model`	an object for which the local influence is desired
`...`	further arguments passed to or from other methods.

local_influence is a generic function to return local influence diagnostics under different perturbation schemes and different directions. local_influence_plot is a generic function to provide friendly plots of such diagnostics.

Local influence diagnostics were first introduced by Cook (1986), where several perturbation schemes were introduced and normal curvatures were obtained. Poon and Poon (1999) introduced the conformal normal curvature, which has nice properties and takes values on the unit interval [0,1]. Zhu and Lee (2001) following Cook (1986) and Poon and Poon (1999) introduced normal and conformal normal curvatures for EM-based models.

The local_influence method returns a list containing the resulting perturbation schemes as elements. The local_influence_plot is called for its side effects.

Cook, R. D. (1986) Assessment of Local Influence. Journal of the Royal Statistical Society. Series B (Methodological), Vol. 48, pp.133-169. https://rss.onlinelibrary.wiley.com/doi/10.1111/j.2517-6161.1986.tb01398.x

Poon, W.-Y. and Poon, Y.S. (1999) Conformal normal curvature and assessment of local influence. Journal of the Royal Statistical Society. Series B (Methodological), Vol. 61, pp.51-61. https://rss.onlinelibrary.wiley.com/doi/abs/10.1111/1467-9868.00162

Zhu, H.-T. and Lee, S.-Y. (2001) Local influence for incomplete data models. Journal of the Royal Statistical Society. Series B (Methodological), Vol. 63, pp.111-126. https://rss.onlinelibrary.wiley.com/doi/abs/10.1111/1467-9868.00279

local_influence.mixpoissonreg, local_influence_plot.mixpoissonreg, local_influence_autoplot.mixpoissonreg

mixpoissonreg documentation built on March 11, 2021, 1:07 a.m.