Fixed effects in PLS model

Hi,

To solve the model Y = XB, I use the function:

object <- pls(X, Y, ncomp = 2)

being X the independent matrix with 50 continuous variables, and Y a unique dependent variables.

I would like to include fixed effects (categorical) in the PLS model, apart from the X matrix ( Y = diet + XB), and I don't know how.

I would be very grateful if you could help me Thanks in advance,

Marina

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