rzi function

random number generation of zero-inflated count response

rzi(n, x, z, a, b, theta=1, family=c("poisson", "negbin", "geometric"), infl=TRUE)

Arguments

• n: sample size of random number generation
• x: design matrix of count model
• z: design matrix of zero model
• a: coefficient vector for x, length must be the same as column size of x
• b: coefficient vector for z, length must be the same as column size of z
• theta: dispersion parameter for family="negbin"
• family: distribution of count model
• infl: logical value, if TRUE, zero-inflated count response

Details

random number generation of zero-inflated count response

Returns

numeric vector of zero-inflated count response

References

Zhu Wang, Shuangge Ma, Ching-Yun Wang, Michael Zappitelli, Prasad Devarajan and Chirag R. Parikh (2014) EM for Regularized Zero Inflated Regression Models with Applications to Postoperative Morbidity after Cardiac Surgery in Children, Statistics in Medicine. 33(29):5192-208.

Zhu Wang, Shuangge Ma and Ching-Yun Wang (2015) Variable selection for zero-inflated and overdispersed data with application to health care demand in Germany, Biometrical Journal. 57(5):867-84.

Author(s)

Zhu Wang zwang145@uthsc.edu