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ModelSpec.variables_by_source['data'] fails to capture variables wrapped in the quote operator Q()

Status: Open.

#266 In matthewwardrop/formulaic;

· 136s opened on Feb 7, 2026

get_model_matrix for MULTISTAGE formula

Status: Open.

#264 In matthewwardrop/formulaic;

· leostimpfle opened on Dec 29, 2025

Feasture Request: fixest::i() operator to set reference levels and interact Categorical Variables

Status: Open.

#244 In matthewwardrop/formulaic;

· s3alfisc opened on Jan 12, 2025

Add support for tensor smoothing (te)

enhancementNew feature or requestNew feature or request

good first issueGood for newcomersGood for newcomers

Status: Open.

#240 In matthewwardrop/formulaic;

· matthewwardrop opened on Jan 9, 2025

Add support to ModelSpec for extracting metadata about factor levels used in specific columns.

enhancementNew feature or requestNew feature or request

Status: Open.

#238 In matthewwardrop/formulaic;

· s3alfisc opened on Jan 4, 2025

·  

1.2.0

Provide better guidance around public vs. private APIs

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#229 In matthewwardrop/formulaic;

· matthewwardrop opened on Dec 15, 2024

·  

1.2.0

Add incremental design matrix building

Status: Open.

#192 In matthewwardrop/formulaic;

· zmbc opened on Oct 28, 2024

Is it possible to define custom operators?

Status: Open.

#177 In matthewwardrop/formulaic;

· s3alfisc opened on Mar 4, 2024

Handling individual columns that can expand into multiple columns

enhancementNew feature or requestNew feature or request

Status: Open.

#163 In matthewwardrop/formulaic;

· ptonner opened on Dec 1, 2023

Allow formatting the categorical encoded variables

enhancementNew feature or requestNew feature or request

Status: Open.

#158 In matthewwardrop/formulaic;

· hguturu opened on Sep 29, 2023

·  

1.2.0

How to include structural zeros?

enhancementNew feature or requestNew feature or request

questionFurther information is requestedFurther information is requested

Status: Open.

#152 In matthewwardrop/formulaic;

· windisch opened on Aug 23, 2023

Proposal: support columns representing multiple features

enhancementNew feature or requestNew feature or request

questionFurther information is requestedFurther information is requested

Status: Open.

#149 In matthewwardrop/formulaic;

· ghost opened on Jul 31, 2023