The SpecialIndex class.
This class represents indexing using logical indexing or a list of indices into a matrix.
## S4 method for signature 'Expression,index,missing,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,missing,index,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,index,index,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,matrix,index,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,index,matrix,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,matrix,matrix,ANY' x[i, j, ..., drop = TRUE] ## S4 method for signature 'Expression,matrix,missing,ANY' x[i, j, ..., drop = TRUE] SpecialIndex(expr, key) ## S4 method for signature 'SpecialIndex' name(x) ## S4 method for signature 'SpecialIndex' is_atom_log_log_convex(object) ## S4 method for signature 'SpecialIndex' is_atom_log_log_concave(object) ## S4 method for signature 'SpecialIndex' get_data(object) ## S4 method for signature 'SpecialIndex' .grad(object)
x, object |
An Index object. |
i, j |
The row and column indices of the slice. |
... |
(Unimplemented) Optional arguments. |
drop |
(Unimplemented) A logical value indicating whether the result should be coerced to the lowest possible dimension. |
expr |
An Expression representing a vector or matrix. |
key |
A list containing the start index, end index, and step size of the slice. |
name: Returns the index in string form.
is_atom_log_log_convex: Is the atom log-log convex?
is_atom_log_log_concave: Is the atom log-log concave?
get_data: A list containing key.
.grad: Gives the (sub/super)gradient of the atom w.r.t. each variable
exprAn Expression representing a vector or matrix.
keyA list containing the start index, end index, and step size of the slice.
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