nca_extract: get model parameters

In NCA: Necessary Condition Analysis

get model parameters

Description

Get the model parameters.

Usage

nca_extract(model, x=NULL, ceiling=NULL, param='Effect size')

Arguments

model	The model produced by nca_analysis
x	Name of the condition, defaults to the first
ceiling	Name of the ceiling, defaults to the first
param	Name of the parameter, default 'Effect size'

Examples

data(nca.example)
model <- nca_analysis(nca.example, c('Individualism', 'Risk taking'), 3)

# The names of the parameters can be found in the summaries
nca_output(model, plots=FALSE, summaries=TRUE)

# Get the Ceiling zone
extract <- nca_extract(model, 'Individualism', 'ce_fdh', 'Ceiling zone')
print(extract)

# Get the Scope
extract <- nca_extract(model, 'Individualism', 'ce_fdh', 'Scope')
print(extract)

# For multiple values: vectorize one argument and pin the others
names <- c('Individualism', 'Risk taking')
extracts <- sapply(names, nca_extract,
                   model=model, ceiling='ce_fdh', param='Ceiling zone')
print(extracts)

params <- c('Effect size', 'Ceiling zone')
extracts <- sapply(params, nca_extract,
                   model=model, x='Individualism', ceiling='ce_fdh')
print(extracts)

# It is also possible to get the extract directly from the model
# Get the Ceiling zone
print(model$`Ceiling zone`$Individualism$ce_fdh)

# Get the Scope, global parameters are independent of the ceiling  
print(model$Scope$Individualism)

NCA documentation built on March 20, 2026, 5:08 p.m.