# How does training data and validation data relate in "time"?

**URL:** <https://forum.numer.ai/t/how-does-training-data-and-validation-data-relate-in-time/3161>\
**Category:** Tournament\
**Created:** [May 1, 2021, 8:39pm UTC](https://forum.numer.ai/t/how-does-training-data-and-validation-data-relate-in-time/3161 "2021-05-01T20:39:30Z")\
**Posts on this page:** 1\
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**Author:** ![gammarat](https://yyz1.discourse-cdn.com/flex009/user_avatar/forum.numer.ai/gammarat/32/3281_2.png) [@gammarat](https://forum.numer.ai/u/gammarat)\
**Post date:** [May 2, 2021, 2:04pm UTC](https://forum.numer.ai/t/how-does-training-data-and-validation-data-relate-in-time/3161/6 "2021-05-02T14:04:26Z")

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I quite agree, at least in some ways.FWIW, I really like your idea of turning the covariance matrices into pixel art. Maybe Numerai should produce NFTs from the covariance matrices for each live era - a big one for the over all round winner, smaller ones from the matrices of combinations of feature groups - and award them to the high scorers? I digress.

Anyway, I’m personally intrigued by how each era relates to the others; so I’ve been exploring that over in the the [Analyzing Training Data](http://forum.numer.ai/t/analyzing-training-data/3143/3) thread. If you look at the evolution of the averaged STD for the feature groups Charisma and Strength from the first training set through to the live round there’s an interesting trend.

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