[#6581] Add sep="" option to model.Matrix?

Date:
2018-05-02 20:15 Priority:
3

State:
Open

Submitted by:
Vitalie Spinu (spinuvit) Assigned to:
Martin Maechler (mmaechler)

Product:
None Operating System:
None

Component:
None

Summary:
Add sep="" option to model.Matrix?

Detailed description
Would it be possible to add `sep=""` option for the term-component name? In both, stats model.matrix and model.Matrix, collapsed factorlevels are hard to read and inconvenient to work with programmatically. > df <- data.frame(y = 1:3, factor = c("level1", "level2", "level3")) > model.Matrix(y ~ factor, df) 3 x 3 Matrix of class "ddenseModelMatrix" (Intercept) factorlevel2 factorlevel3 1 1 0 0 2 1 1 0 3 1 0 1 Thanks!

Comments:

Message
Date: 2020-05-25 14:44 Sender: Martin Maechler Moved from Bugs to Feature Requests
Date: 2020-05-25 14:44 Sender: Martin Maechler this is a reasonal "Feature request" (not a bug), thank you. I'm at least assigning it to myself, finally, and hope to get implementing it ASAP.

Field	Old Value	Date	By
type	Bugs	2020-05-25 14:44	mmaechler
assigned_to	none	2020-05-25 14:44	mmaechler
details	Would it be possible to add `sep=""` option for the term-component name? In both, stats model.matrix and model.Matrix, collapsed factorlevels are hard to read and inconvenient to work with programmatically. > df <- data.frame(y = 1:3, factor = c("level1", "level2", "level3")) > model.Matrix(y ~ factor, df) 3 x 3 Matrix of class "ddenseModelMatrix" (Intercept) factorlevel2 factorlevel3 1 1 0 0 2 1 1 0 3 1 0 1 Thanks!	2020-05-25 14:44	mmaechler