QR = TRUE in BRMS interface? [QR Decomposition]

#1

Hi,

Does the BRMS package offer the functionality to provide QR = TRUE? i.e. a QR Decomposition? (https://mc-stan.org/users/documentation/case-studies/qr_regression.html)

I couldn’t find anything. I ask because I have a regression model with a ton of data points, quite a few predictors, and plenty of potential correlations looming. I will centre variables.

Many thanks,

Ilan

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#2

brms does currently not support QR decomposition, but it could be a nice feature to support in the feature. Feel free to open an issue for it on https://github.com/paul-buerkner/brms

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#3

In retrospect, it might have been better to use the orthogonal factor from a polar decomposition in linear models rather than from a QR decomposition. The original priors would make more sense that way.

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