sketching operator scaling in preconditioner generation (see issue #62)

BallisticLA · Jan 17, 2024 · 01278cb · 01278cb
1 parent aae08e2
commit 01278cb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/RandLAPACK/comps/rl_preconditioners.hh b/RandLAPACK/comps/rl_preconditioners.hh
@@ -59,6 +59,7 @@ void rpc_data_svd(
         A, lda,
         0.0, A_sk, lda_sk
     );
+    blas::scal(d*n, 1.0/std::sqrt(d), A_sk, 1);
 
     // step 2: apply an LAPACK SVD function to A_sk and process the output.
     if (layout == Layout::ColMajor) {