bin_screen: Binary IRT Screener
In davidaarmstrong/seqirt: Sequential Multi-dimensional Item Response Theory

Implements a screening pass of a cross-sectional binary IRT to identify variables to be included for each dimension.

1	bin_screen(X, Dim = 2, thresh = 0.35, control = NULL)

`X`	Roll call matrix
`Dim`	Number of dimensions to estimate
`thresh`	Threshold for the K-means clustering in the final stage. If all PRE values are above `thresh`, then no clustering will be done and all and all remaining variables will be retained.
`control`	List of control arguments for the `binIRT()` function from the `emIRT` package.