Dimensionality {exametrika} | R Documentation |
Dimensionality
Description
The dimensionality is the number of components the test is measuring.
Usage
Dimensionality(U, na = NULL, Z = NULL, w = NULL)
## Default S3 method:
Dimensionality(U, na = NULL, Z = NULL, w = NULL)
## S3 method for class 'binary'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)
## S3 method for class 'rated'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)
## S3 method for class 'ordinal'
Dimensionality(U, na = NULL, Z = NULL, w = NULL)
Arguments
U |
Either an object of class "exametrika" or raw data. When raw data is given,
it is converted to the exametrika class with the |
na |
Values to be treated as missing values. |
Z |
Missing indicator matrix of type matrix or data.frame. Values of 1 indicate observed responses, while 0 indicates missing data. |
w |
Item weight vector specifying the relative importance of each item. |
Value
Returns a list of class c("exametrika", "Dimensionality") containing:
- Component
Sequence of component numbers
- Eigenvalue
Eigenvalues of the tetrachoric correlation matrix
- PerOfVar
Percentage of variance explained by each component
- CumOfPer
Cumulative percentage of variance explained
[Package exametrika version 1.5.1 Index]