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SimlinRegDS = function(Matrix[Double] X, Matrix[Double] y, Double lamda, Integer N) return (Matrix[double] beta)
{
  # Reuse sp_tsmm and sp_mapmm if not future-based
  A = (t(X) %*% X) + diag(matrix(lamda, rows=N, cols=1));
  b = t(X) %*% y;
  beta = solve(A, b);
}

no_lamda = 10;

stp = (0.1 - 0.0001)/no_lamda;
lamda = 0.0001;
lim = 0.1;

X = rand(rows=1500, cols=1500, seed=42);
y = rand(rows=1500, cols=1, seed=43);
N = ncol(X);
R = matrix(0, rows=N, cols=no_lamda+2);
i = 1;

while (lamda < lim)
{
  beta = SimlinRegDS(X, y, lamda, N);
  #beta = lmDS(X=X, y=y, reg=lamda);
  R[,i] = beta;
  lamda = lamda + stp;
  i = i + 1;
}

R = sum(R);
write(R, $1, format="text");

