statistics - Compositional Data and Isometric Log ratio (ILR) transformation in SAS

Question

I have a compositional data and need to use compositional data analysis? The independent variables are ratios and hence I cannot use regular classical regression without variable transformations.

y=A + BM + CN + error; where M, N and O are ratios such that M+N+O=1. A,B and C are model parameters. Y is a continuous variable. The parameters have to estimated with the constraint that the sum of the ratios=1.

Can this be done in SAS?

How do you transform a variable using isometric log-ratio (ILR) transformation using SAS?

Any help would be greatly appreciated.

question from:https://stackoverflow.com/questions/65647271/compositional-data-and-isometric-log-ratio-ilr-transformation-in-sas

Answer 1

Waitting for answers