plot.irt.prob {plink} | R Documentation |
This function plots item characteristic curves or item category curves using the
lattice
package.
## S3 method for class 'irt.prob': plot(x, y, ..., combine = NULL, item.names = NULL, item.lab = TRUE, panels = 20) ## S3 method for class 'sep.pars': plot(x, y, ...) ## S3 method for class 'irt.pars': plot(x, y, ...)
x |
object of class irt.prob , irt.pars , or sep.pars . For the
later two classes, probabilities are computed using the function mixed before
plotting the curves. |
y |
this argument is not used for these methods |
... |
further arguments passed to or from other methods |
combine |
vector identifying the number of response categories to plot in each
panel. If NULL , the curves will be grouped by item. combine is
typically used to plot curves for more than one item in a panel. |
item.names |
vector of item names for use in labeling the panels. |
item.lab |
if TRUE , include the item label strip at the top of each panel |
panels |
number of panels to display in the output window. If the number of items
is greater than panels , the plots will be created on multiple pages. If
NULL , all panels will be plotted on a single page. |
When multiple pages are created, the PgUp and PgDn buttons can be used to view the plots on different pages
Jonathan P. Weeks weeksjp@gmail.com