<p><a href="https://github.com/stereomatchingkiss" class="user-mention">@stereomatchingkiss</a> <br>
I've been working on this.<br>
But it seems to be impossible to make fully compatible Impute() function that applies all dimensions.<br>
Because the information is dependent on the DatasetMapper object produced by the load() function.<br>
I will close this for this moment and make pull request excluding Impute()-for-all-dimensions patch,</p>

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