residuals | R Documentation |
Computes the residuals for vectors of response patterns.
## S3 method for class 'gpcm' residuals(object, resp.patterns = NULL, order = TRUE, ...) ## S3 method for class 'grm' residuals(object, resp.patterns = NULL, order = TRUE, ...) ## S3 method for class 'ltm' residuals(object, resp.patterns = NULL, order = TRUE, ...) ## S3 method for class 'rasch' residuals(object, resp.patterns = NULL, order = TRUE, ...) ## S3 method for class 'tpm' residuals(object, resp.patterns = NULL, order = TRUE, ...)
object |
an object inheriting either from class |
resp.patterns |
a |
order |
logical; if |
... |
additional arguments; currently none is used. |
The following residuals are computed:
(O_i - E_i) / E_i^(1/2),
where O_i and E_i denote the observed and expected frequencies for the ith response pattern.
A numeric matrix
containing the observed and expected frequencies as well as the residual value for
each response pattern.
Dimitris Rizopoulos d.rizopoulos@erasmusmc.nl
fitted.gpcm
,
fitted.grm
,
fitted.ltm
,
fitted.rasch
,
fitted.tpm
fit <- ltm(LSAT ~ z1) residuals(fit) residuals(fit, order = FALSE)
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