Extract Model Information from an mcpfit

Standard R accessors for the model formulas, family, fitting data, and number of observations stored in an mcpfit.

Usage

# S3 method for class 'mcpfit'
family(object, ...)

# S3 method for class 'mcpfit'
nobs(object, ...)

# S3 method for class 'mcpfit'
model.frame(formula, ...)

# S3 method for class 'mcpfit'
formula(x, segment = NULL, ...)

Arguments

object, x, formula

An mcpfit object.

...

Must be empty. Reserved for future use.

segment

NULL to return all segment formulas, or a positive integer selecting one segment.

Value

formula() returns the complete list of segment formulas, or one formula when segment is supplied. family() returns an mcpfamily. model.frame() returns the data retained in the fit. nobs() returns the number of observed response values (excluding missing responses).

Examples

formula(demo_fit)  # Show all segment formulas
#> List of 3
#>  $ response ~ 1
#>  $ ~0 + time
#>  $ ~1 + time
formula(demo_fit, segment = 2)  # Show the formula for segment 2
#> ~0 + time
family(demo_fit)  # Show the response family and link
#> Family: gaussian
#> Links: mu = identity; sigma = identity
head(model.frame(demo_fit))  # Show the top rows of fitting data
#>    response     time
#> 1 12.235516 76.33986
#> 2  6.351706 83.51711
#> 3 28.049953 60.18529
#> 4 15.681983 74.72964
#> 5 16.213643 85.88256
#> 6 22.322824 40.05069
nobs(demo_fit)  # Count observed response rows
#> [1] 100