Rfast2: ztp.reg – R documentation

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ztp.reg

Zero truncated Poisson regression

Zero truncated Poisson regression.

ztp.reg(y, x, full = FALSE, tol = 1e-07, maxiters = 100)

`y`	The dependent variable, a numerical vector with integer valued numbers.
`x`	A matrix or a data.frame with the indendent variables.
`full`	If you want full information (standard errors, Walt test statistics and p-values of the regression coefficients) set this equal to TRUE.
`tol`	The tolerance value required by the Newton-Raphson to stop.
`maxiters`	The maximum iterations allowed.

A zero truncated poisson regression model is fitted.

A list including:

`be`	The regression coefficients if "full" was set to FALSE.
`info`	This is returned only if "full" was set to TRUE. It is a matrix with the regression coefficients, their standard errors, Walt test statistics and p-values.
`loglik`	The loglikelihood of the regression model.
`iter`	The iterations required by the Newton-Raphson.

Michail Tsagris

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr.

y <- rpois(100, 5)
y[y == 0] <- 1
x <- matrix( rnorm(100 * 5), ncol = 5 )
mod <- ztp.reg(y, x)

A Collection of Efficient and Extremely Fast R Functions II

v0.0.9

GPL (>= 2.0)

Authors

Manos Papadakis, Michail Tsagris, Stefanos Fafalios and Marios Dimitriadis.

Initial release

2021-03-21