lordif (version 0.4.2)

collapse: collapses response categories

Description

Collapses response categories if cell frequencies by group are below a minimum threshold specified by minCell and returns a vector of recoded responses.

Usage

collapse(resp, group, minCell)

Value

a numeric vector of the same length as resp with collapsed/recoded values.

Arguments

resp

a vector of item responses

group

a vector of group designations

minCell

a minimum cell frequency

Author

Seung W. Choi <[e-mail]>

Details

Collapses item response categories in resp if the two-way contingency table (resp x group) has cell frequencies less than the minimum cell count threshold specified by minCell.

See Also

recode

Examples

  r1 <- c(1,1,2,1,1,2,2,1,2,2,1,2,2,1,1,2,1,2,2,3,3,1,2,3)
  gr <- c(0,0,0,1,1,0,1,1,0,0,1,0,1,1,0,1,0,1,0,1,0,1,0,1) 
  collapse(r1,gr,2) #minCell=2
  ## returns  c(1,1,2,1,1,2,2,1,2,2,1,2,2,1,1,2,1,2,2,2,2,1,2,2)
  ## response categories 2 and 3 are collapsed