edge (version 2.4.2)

nullMatrix: Matrix representation of null model

Description

These generic functions access and set the null matrix for deSet object.

Usage

nullMatrix(object)
nullMatrix(object) <- value
## S3 method for class 'deSet':
nullMatrix(object)
## S3 method for class 'deSet':
nullMatrix(object) <- value

Arguments

object

S4 object: deSet

value

matrix: null model matrix where columns are covariates and rows are observations

Value

• nullMatrix returns the value of the null model matrix.

See Also

deSet, fullModel and fullModel

Examples

# import data
library(splines)
data(kidney)
age <- kidney$age
sex <- kidney$sex
kidexpr <- kidney$kidexpr
cov <- data.frame(sex = sex, age = age)

# create models
null_model <- ~sex
full_model <- ~sex + ns(age, df = 4)

# create deSet object from data
de_obj <- build_models(data = kidexpr, cov = cov, null.model = null_model,
full.model = full_model)

# extract the null model as a matrix
mat_null <- nullMatrix(de_obj)