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Use "pre-processing" in a sentence
"PCA is a horrible choice for pre-processing step for a few reasons (without reweighting it makes any training afterward rotationally symmetric), but yes it is probably a proprietary something else."
"Precipitation trends over the Russian permafrost-free zone: removing the artifacts of pre-processing."
"Getting anything approaching a meaningful value required “tweaking” various datasets in various ways to attempt to correct for various observational and measurement errors, which required tracking which values came from which datasets, how they were collected, if they had any prior pre-processing, and soforth."