coef.lod_lm {lodr}

Extract lod_lm Coefficients

Description

Extracts estimates regression coefficients from object of class "lod_lm".

Usage

## S3 method for class 'lod_lm'
coef(object, ...)

Arguments

object

An object of class "lod_lm", usually, a result of a call to lod_lm

...

further arguments passed to or from other methods.

Value

Coefficients extracted from object as a named numeric vector.

Author(s)

Kevin Donovan, [e-mail].

Maintainer: Kevin Donovan <[e-mail]>

References

May RC, Ibrahim JG, Chu H (2011). “Maximum likelihood estimation in generalized linear models with multiple covariates subject to detection limits.” Statistics in medicine, 30(20), 2551–2561.

See Also

fitted.lod_lm and residuals.lod_lm for related methods; lod_lm for model fitting.

The generic functions fitted and residuals.

Examples

 library(lodr)
 ## Using example dataset provided in lodr package: lod_data_ex
 ## 3 covariates: x1, x2, x3 with x2 and x3 subject to a lower limit of
 ## detection of 0

 ## nSamples set to 100 for computational speed/illustration purposes only.  
 ## At least 250 is recommended.  Same for boots=0; results in NAs returned for standard errors
 fit <- lod_lm(data=lod_data_ex, frmla=y~x1+x2+x3, lod=c(0,0),
                   var_LOD=c("x2", "x3"), nSamples=100, boots=0)
 coef(fit)