Description Usage Arguments Details References Examples
Compute the variance-covariance matrix of parameter estimates of a CUB model with covariates for the feeling component.
1 | varcovcub0q(m, ordinal, W, pai, gama)
|
m |
Number of ordinal categories |
ordinal |
Vector of ordinal responses |
W |
Matrix of covariates for explaining the feeling component |
pai |
Uncertainty parameter |
gama |
Vector of parameters for the feeling component, whose length is NCOL(W)+1 to include an intercept term in the model (first entry of gama) |
The function checks if the variance-covariance matrix is positive-definite: if not, it returns a warning message and produces a matrix with NA entries.
Piccolo D.(2006), Observed Information Matrix for MUB Models. Quaderni di Statistica, 8, 33–78,
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