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bbfunc Get functions for computing matrix-vector products [f,fH,arg]=bbfunc(BB) returns functions handles for computing the matrix-vector products A*x and A'*x, where A corresponds to the black-box matrix BB. Use feval to evaluate a product: y=feval(f,x,arg{:}) computes y=A*x x=feval(fH,y,arg{:}) computes x=A'*y Use bbfuncm if you need to evaluate matrix-matrix products. See also , bbfuncm, bbsimplify, bbinline.