(Solved) : Landweber Iteration Nonnegative Solutions 1 Problem 62 Consider Following Test Problem Reg Q35533000 . . . .

Landweber iteration for nonnegative solutions [1, problem 6.2] Consider the following test problem from the regularization toolboz [A, xtrue]-phillips (n) xtrue = xtrue -0.5; % shift true sol by 0.5 xtrue(xtrue<0) = 0; % make sure true sol is >= 0 b-A+xtrue + 1e-1*randn (n, 1); % RHS + noise Solve this problem using both methods below with initial guess r0: . Method A: Regular Landweber iteration . Method B: Landweber iteration enforcing positivity where P : Rn → Rn