| 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