adds grid_type argument to datagrid

[LamAdr]

The book uses the grid_type argument. Do you want to support it?
Otherwise I can just use datagridcf directly.

[vincentarelbundock]

Yes, can you also remove the grid_type everywhere you see it in the R code and use datagridcf() instead? thanks!

[vincentarelbundock]

Meaning, I don't think we need to make this change in Python. I would rather soft deprecate this in R.

[LamAdr]

Sure. You want me to remove the grid_type references in the book only or in the R code too?

[vincentarelbundock]

Just the book.