link function

Utility function

Apply the link function or its inverse to the argument.

link(x, link = "log", inv = FALSE)

Arguments

• x: vector containing the predictor
• link: string with the name of the link function
• inv: if TRUE its inverse is applied

Details

This function is intended to port other link functions than $\log{\left(\right)}$ to Poisson-Gamma Additive Models. For now, the only allowed value is "log".

Returns

Evaluated link function at x values.

References

Harvey, A. C., Fernandes, C. (1989) Time series models for count data or qualitative observations. Journal of Business and Economic Statistics, 7(4):407--417

McCullagh, P., Nelder, J. A. (1989). Generalized Linear Models. Chapman and Hall, 2nd edition, London

Author(s)

Washington Leite Junger wjunger@ims.uerj.br and Antonio Ponce de Leon ponce@ims.uerj.br

Note

This function is not intended to be called directly.

See Also

pgam, formparser