This function checks whether the labels between the Y, K, and G
matrices make sense. This means that all the labels found as
rownames for y can be found as rownames and column
names of k, and all the colnames for y can be found
as rownames and colnames of g (if provided).
valid_labels(y, k, g = NULL)the label matrix
the kernel matrix for the rows
the kernel matrix for the columns (optional). If not available,
it takes the value NULL
TRUE if all labels are compatible, an error otherwise.
Compatible labels mean that it is unequivocally clear which rows and columns can be linked throughout the model. In case none of the matrices have row- or colnames, the labels are considered compatible. In all other cases, all matrices should have both row and column names. They should fulfill the following conditions:
the row- and column names of a kernel matrix must contain the same values in the same order. Otherwise, the matrix can't be symmetric.
the rownames of y should correspond to the rownames
of k
the colnames of y should correspond to the colnames
of g if it is supplied, or the colnames of k in
case g is NULL