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% ********************************************************************
% Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.
% ********************************************************************
function A=cleanmat(B,toclean)
%{
-------------------------------------------------------------
This function makes zero 'toclean' non-zero
elements of B that are not in the diagonal.
A = cleanmat(B, toclean)
inputs:
B the original matrix (sparse matrix)
toclean the number of elements to be removed
outputs:
A the modified resulting matrix (sparse matrix)
(This script is for internal use only. It is not part of
rocSOLVER library interface and could change or be removed
without any notice)
-------------------------------------------------------------
%}
n = size(B,1);
A=full(B);
c = 0;
while c < toclean,
for i=1:n,
cc = 0;
for j=1:n,
if (A(i,j) != 0 && i != j),
A(i,j) = 0;
cc = 1;
break;
end;
end;
if cc == 1,
c = c + 1;
break;
end;
end;
end;
A=sparse(A);
end
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