Auto-document

[tmastny]

add a function that takes a model and constructs an .R script that recreates the model for documentation.

[tmastny]

train object attribute control has a list of parameters that go into the trainControl caret function. Could use those to recreate that aspect of the model..

Also, train$call is the actual formula used.

EDIT: I haven't figured out how to capture the train$call as a string. It seems to be a special type.

[tmastny]

Note that the result from train$call is not even directly usable, since it returns train.formula which doesn't work as a script.

[tmastny]

Features I'd want from auto-document:

• [ ] auto_document returns a script that when ran returns the exact model saved
• [ ] shows where seed comes from
• [ ] shows the trainControl function with only the non-default arguments supplied
• [ ] shows the train function with appropriate methods and trControl

Problems:

• how to bring in seeds? Writing the seed as a list literal seems impractical, as the list can be arbitrarily large. Is a dependency on an external file okay?
• same question for folds, unless I can create the createFolds function call (seems unlikely).
  • [ ] Does the trainControl seed determine the folds? I think so

[tmastny]

Closed in favor of #21