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Applying a function to each chain #353

@n-kall

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@n-kall

Are there simple ways (can be internal functions) to apply a function to each chain of a draws or rvar object?

For a draws object, I can do:

example_draws() |>
  extract_variable_matrix("mu") |>
  apply(MARGIN = 2, FUN = ess_bulk)

But the equivalent for an rvar is not immediately clear to me.

This is related to the automatic thinning via ess, which uses this method but if rvars become the default for summarise draws (#184 ), will need to be updated.

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