Feature request: "target ~ ." syntax

[szs8]

R lets you regress a target against all the variables in the dataframe by simply typing "target ~ ."
This is particularly useful when we have lots of columns and don't want to specify each predictor. I don't think patsy supports this yet. Any chance if it can be added? Thanks.

[jseabold]

Just came to file this same request, so +1

[ltrabuco]

+1

[jseabold]

Another vote

https://stackoverflow.com/questions/22388498/statsmodels-linear-regression-patsy-formula-to-include-all-predictors-in-model

[CamDavidsonPilon]

+1 to this feature

[rowanv]

This feature would be great!

[idrisr]

+1

[yw5aj]

+1

[makmanalp]

+1

[clarkfitzg]

+1

[nicke5012]

+1

[makmanalp]

I haven't had a chance to read through the code entirely:

This looks like it'd be a new kind of PYTHON_EXPR. https://github.com/pydata/patsy/blob/master/patsy/parse_formula.py#L68

And then maybe some code here would need to be modified - not sure of this:
https://github.com/pydata/patsy/blob/master/patsy/eval.py

[njsmith]

It should probably be a new token type, if expr_text == ".": token_type = "DOT" or similar.

eval.py wouldn't need any changes -- that's for evaluating Python code, and . is not a Python expression :-). Instead you'd want to look at desc.py, which has the code for taking a formula parse tree and converting it into termlists.

#28 ended up not getting merged, but if anyone's interested in having a go at implementing this, then there's some discussion there of the right way to do it.

[dankessler]

+1

[eriklarson]

+1

[michelleowen]

+1

[ao1]

+1

[irinfox]

+1

[carojasq]

+1

[joeitaliand]

+1000

[harikarajavaram]

This feature would make things easy, +1

[joeitaliand]

Yes! Could not agree more.

On Jul 8, 2016, at 12:14 AM, Harika Rajavaram notifications@github.com wrote:

This feature would make things easy, +1

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[FayolChang]

+1

[JDallasGriffin]

+1

[mrandrewandrade]

+1

[sdmurff]

+1

[whryan]

+1

[eric-czech]

+1

[ghost]

+1

[apachaves]

+1

[mcastillon]

+2

[semerj]

+1

[shoyer]

Please don't ping this issue with "+1" comments: hit 👍 on the first post instead.

As @njsmith wrote above, this is open to pull requests by an interested party. Pinging this issue will not make it happen any faster :).

[hoondy]

++

[steve-the-bayesian]

I'd like to use patsy to drive code other than "model.matrix". In R you can write
plot(y ~ x) or table(y ~ x) to indicate the structure of a plot or contingency table.

[ernestomi]

++ such a useful functionality

[Timuchin]

++

[alexanderquispe]

++++++++++++++++

[benyamindsmith]