ordinal.data: A function for ordinal categorical response data generation.
In simml: Single-Index Models with Multiple-Links

ordinal.data generates ordered category response data (with p covariates and a treatment variable).

1 2	ordinal.data(n = 400, p = 10, R = 11, delta = 1, s = "nonlinear", sigma = 0)

`n`	sample size.
`p`	dimension of covariates.
`R`	number of response levels in y
`delta`	magnitude of "main" effect (i.e., "nuisance" effect) of the covariates; a large delta means a larger "nuisance" variance.
`s`	type of the treatment-by-covariates interation effect ("linear" or "nonlinear")
`sigma`	noise sd in the latent variable representation

`y`	a n-by-1 vector of treatment outcomes.
`A`	a n-by-1 vector of treatment indicators.
`X`	a n-by-p matrix of pretreatment covariates.
`SNR`	the "signal" (interaction effect) to "nuisance" (main effect) variance ratio (SNR) in the canonical parameter function.
`true.beta`	the true single-index coefficient vector.
`delta`	magnitude of "main" effect.
`s`	type of the treatment-by-covariates interation effect.