link.con {plink} | R Documentation |
These functions extract information from an object of class "link
", typically
created using plink
.
link.con(x, method = "ALL") link.pars(x) link.ability(x)
x |
an R object |
method |
character vector identifying the linking methods for which
constants should be returned. The only acceptable values are
ALL, MM, MS, HB, SL, and RM . See below for details. |
link.con
extracts the linking constants,
link.pars
extracts the rescaled item parameters (if present), and
link.ability
extracts the rescaled ability estimates (if present)
For link.con
, the following values can be included for method
.
For multidimensional constants, although matrices A
, K
, and T
are
included in the object of class "link
" for the Haebara and Stocking-Lord
methods, only the matrix A
will be returned for these methods.
MM
:MS
:HB
:SL
:RM
:Returns a matrix or list of linking constants
Jonathan P. Weeks weeksjp@gmail.com