Construct/Extract BAMLSS Design Matrices
The function creates design (or model) matrices for BAMLSS, i.e., for
each parameter of a bamlss.family object.
## S3 method for class 'bamlss.frame' model.matrix(object, data = NULL, model = NULL, drop = TRUE, scale.x = FALSE, ...) ## S3 method for class 'bamlss.formula' model.matrix(object, data = NULL, model = NULL, drop = TRUE, scale.x = FALSE, ...) ## S3 method for class 'bamlss.terms' model.matrix(object, data = NULL, model = NULL, drop = TRUE, scale.x = FALSE, ...)
object |
A |
data |
A data frame or list. |
model |
Character or integer, specifies the model for which design matrices should be returned. |
drop |
If model matrices for only one |
scale.x |
Logical, should the model matrices of the linear parts be scaled? |
... |
Not used. |
Depending on the type of model a named list of model matrices or a single model matrix.
## Generate some data. d <- GAMart() ## Model formula. f <- list( num ~ x1 + x2 + id, sigma ~ x3 + fac + lon + lat ) ## Create a "bamlss.frame". bf <- bamlss.frame(f, data = d) ## Get the model matrices. X <- model.matrix(bf) head(X$sigma) ## Same with "bamlss.formula". X <- model.matrix(bamlss.formula(f), data = d) head(X$sigma)
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