Dear Stepan,
thanks for your feedback!
> Do you have any plans for adding support for user-defined site-specific AA-frequency profiles (like
> the PMSF profiles pre-calculated with IQ-Tree)? These seem to be a fast and effective alternative to
> complex +C10-60 mixture models, which could significantly improve tree inference accuracy while
> requiring almost no extra computational resources compared to the usual models.
> Similar request seems to have been raised by other users
> <
https://groups.google.com/g/raxml/c/nUf_97lwgLc/m/UNALm7v7AAAJ> and, as I can learn from your
> previous post here <
https://groups.google.com/g/raxml/c/R2FHM3tYyvU/m/N38NO9bMBAAJ>, you were
> planning to add the model already in 2019.
I know, PMSF has been on our TODO list for a long time, and still is...
> Meanwhile, from my understanding it seems that one could already use site-specific profiles with the
> current program version by defining a per-site partition model representing the original
> site-specific profile. The only trouble would come here for defining rates globally for the whole
> alignment.
> Having tried it this way, however, I see that for some reason the computation time of such
> single-site partition analysis with fixed rates is exceedingly high.
I briefly looked at PMSF, and it should be indeed possible to simulate it with fixed per-site
frequencies (LG+FU{freqs_siteN.txt}). Of course, you would need to estimate those frequency profiles
externally.
The computation time should not be exceedingly high, but there are a couple of caveats.
Could you please post full log files from these runs?
Best.
Oleksiy
>
> I hope that you'll add support for the site-profile model soon. Thank you!
>
>
> Best regards,
> Stepan
>
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