lrberge
Keep track of origin variable in fml for simplifying etable variables naming
Feature request
It could be useful to keep track of transformations in formulas fed to fixest models in the form of a map (origin-transformed), in order to simplify renaming of variables reported in etable.
Example:
Imagine independent variable age which we lag in a model :
y ~ 1 + l(age, 1) | time + individual
Currently, in my current knowledge of fixest library, we need to use function setFixest_dict with argument c("l(age, 1)", = "Age" )
in order to rename age variable, but it could be easier for users to just use something like:
setFixest_dict("age",="Age", map_non_transformed=TRUE).
When constructing a formula programmatically with lots of transformations, such a feature could be a time saver.
Although, users can build map table from new names to labels table programmatically with a pretty straightforward algorithm:
- Map manually origin variable names to labels -->
list(age="Age") - Create map of origin variables to transformed variable using pattern matching -->
list(age="l(age, 1)") - Based on origin variables as a common key for two previous maps, build a
tables, which can then be used by setFixest_dict-->c("l(age, 1)"="Age")-->setFixest_dict(c("l(age, 1)"="Age")), implementing such a feature on fixest's formula parser side would be less error-prone, particularly less prone to false positives.
