Function: operatorappr

OPERATORAPPR  Best approximation by operator
  Usage: c=operatorappr(Op,K);

  Opout=OPERATORAPPR(Opin,T) computes the an operator Opout of the
  same type as Opin that best approximates the matrix T in the
  Frobenious norm of the matrix (the Hilbert-Schmidt norm of the
  operator).

  For some operator classes, the approximation is always exact, so that
  operator(Opout,f) computes the exact same result as T'*f.

Url: http://ltfat.github.io/doc/operators/operatorappr.html

See also: operatornew, operator, operatoreigs.

Package: ltfat