AlphaIfDel | R Documentation |
This function returns the alpha coefficient when the specified item is excluded.
AlphaIfDel(x, delItem = NULL, na = NULL, Z = NULL, w = NULL)
x |
This should be a data matrix or a Covariance/Phi/Tetrachoric matrix. |
delItem |
Specify the item to be deleted. If NULL, calculations are performed for all cases. |
na |
This parameter identifies the numbers or characters that should be treated as missing values when 'x' is a data matrix. |
Z |
This parameter represents a missing indicator matrix. It is only needed if 'x' is a data matrix. |
w |
This parameter is an item weight vector. It is only required if 'x' is a data matrix. |
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