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data_mining:crossvalidation [2018/05/10 14:10]
phreazer
data_mining:crossvalidation [2018/05/10 14:30] (current)
phreazer [Mismatched train/test distribution]
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 ===== Mismatched train/test distribution ===== ===== Mismatched train/test distribution =====
-  * Should have same distribution+  * Should have same distribution, but sometimes training set needs more data which comes from different distribution¬†
 +      * Then dev/test set should come from same distribution¬†
 +¬†
 +Sometimes there is no test set, so you don't have a **unbiased** estimation (might overfit to dev set).