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Determine the Order of Indicators Using a 'lavaan' Model Syntax

Source: R/lavaan_indicator_order.R
lavaan_indicator_order.Rd

Determine the order of indicators and match indicators and factors based on a 'lavaan' model syntax.

Usage

lavaan_indicator_order(model_syntax)

Arguments

model_syntax

A string that should be a model specified in lavaan model syntax. Only the factor structure (operator =~) in the model will be used.

Value

A named character vector. The values are the indicators in the model syntax. The names are the latent factors the indicators loaded on.

Details

It generates a named vector for the argument indicator_order of set_cfa_layout() and set_sem_layout() using a lavaan model syntax.

A variable is considered an indicator if it is on the right-hand side of the operator =~.

If an indicator loaded on more than one latent variable, it will only be matched to one of them, determined by the order of appearance in the internal storage.

See also

set_sem_layout() and set_cfa_layout().

Examples


mod <-
  'f1 =~ x01 + x02 + x03 + x06
   f4 =~ x11 + x12 + x13 + x14
   f2 =~ x04 + x05 + x06 + x07
   f3 =~ x08 + x09 + x10 + x03
  '
lavaan_indicator_order(mod)
#>    f1    f1    f1    f1    f4    f4    f4    f4    f2    f2    f2    f3    f3 
#> "x01" "x02" "x03" "x06" "x11" "x12" "x13" "x14" "x04" "x05" "x07" "x08" "x09" 
#>    f3 
#> "x10" 

mod <-
  'f1 =~ x01 + x02 + x03 + x06
   f3 =~ x08 + x09 + x10 + x03
   f2 =~ x04 + x05 + x06 + x07
   f4 =~ x11 + x12 + x13 + x14
   f3 ~ f1 + f2
   f4 ~ f3
  '
lavaan_indicator_order(mod)
#>    f1    f1    f1    f1    f3    f3    f3    f2    f2    f2    f4    f4    f4 
#> "x01" "x02" "x03" "x06" "x08" "x09" "x10" "x04" "x05" "x07" "x11" "x12" "x13" 
#>    f4 
#> "x14"