Re: [R] Column names of model.matrix's output with contrast.arg

You're at the mercy of the various contr.XXX functions. They may or may not set the colnames on the matrices that they generate. The rationales for (not) setting them is not perfectly transparent, but you obviously cannot use level names on contr.poly, so it uses .L, .Q, etc. In MASS, contr.s

[R] [Rd] R 4.4.1 is released

The build system rolled up R-4.4.1.tar.gz (codename "Race for Your Life") this morning. === This release is dedicated to the memory of Friedrich (Fritz) Leisch, 1968-2024. =