Description Usage Arguments Details Value Author(s) See Also Examples
The diagonal tensor is the tensor equivalent of the diagonal matrix.
1 | diag.tensor(X,mark="'",dn=NULL,by=NULL)
|
X |
a tensor containing the diagonal entries. |
mark |
a character to be concatenated to the names of the row dimensions to get the column dimension names |
dn |
dimnames which are used twice |
by |
The diagonal tensor is created for each level of the indices
in |
E_{i_1...i_n j_1...j_n}=δ_{i_1j_1}...δ_{i_n j_n}
a tensor with dimension c(dim(X),mark(dim(X),mark))
K. Gerald van den Boogaart
1 2 3 | A <- to.tensor(1:4,c(a=2,b=2))
diag.tensor(A)
diag.tensor(A,by="b")
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