A fix for StaticSVD::ComputeSVD to preserve snapshots #268
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dreamer2368
requested review from
ckendrick,
dylan-copeland,
chldkdtn and
siuwuncheung
…ration and deletes it after SVD.
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@chldkdtn @dylan-copeland @ckendrick @siuwuncheung , I made the change per @dylan-copeland 's suggestion and it is ready for review and merge. I made this PR separate from other branches so that this can be merged independently. |
ckendrick
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Feb 22, 2024
dylan-copeland
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Feb 23, 2024
andersonw1
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Apr 2, 2024
* StaticSVD::ComputeSVD - copies the sample snapshot matrix for SVD operation and deletes it after SVD. * option for StaticSVD to preserve snapshot. * line break for long message.
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StaticSVD::ComputeSVDperforms SVD using scalapack'spdgesvd, which does not preserve the original snapshot matrix. This can be a potential source of error when runningBasisGenerator::getSnapshotMatrixafter SVD operation (BasisGenerator::endSamples()).StaticSVDnow has an option to preserve the snapshot. This option is driven by thebooloptionOptions::static_svd_preserve_snapshot.If snapshot preserving option is false,
StaticSVD::computeSVDuses the originald_samplesas before, modifying the matrix.StaticSVD::getSnapshotMatrixafter svd operation will return an error, so that users would not use the modified snapshot matrix.If snapshot preserving option is true,
StaticSVD::computeSVDcopies fromd_samplesintosnapshot_matrixeither transposed or original, and usesnapshot_matrixas working matrix for SVD operation, preserving the original snapshot matrixd_samples. The working matrixsnapshot_matrixis destroyed at the end of the function call.