Spot operator: opRestriction | Spot Home Page |
opRestriction Restriction operator. opRestriction(N,IDX) creates a restriction operator that selects the entries listed in the index vector IDX from an input vector of length N. The adjoint of the operator creates a zero vector of length N and fills the entries given by IDX with the input data. Algebraically, opRestriction(N,IDX) is equivalent to a matrix of size length(IDX)-by-N, where row i has a single 1 in column IDX(i).