[Rd] Inconsistency in grid::grid.polyline

[Paul Murrell]

Hi

The general "evolution" of grid.*() functions (that I have written) have 
tended towards the grid.polyline() style ...

grid.*(...) {
     grid.draw(*Grob(...))
}

With my thinking at least heading towards:  if you are calling grid.*(), 
then you want to actually draw something;  if you want to just create a 
description of something to draw, then you want to call *Grob().

In other words, I have come to view the 'draw' argument to grid.*() as 
redundant.

That reflects how I use 'grid', so I may be unaware of an important 
counter argument.

Paul

On 25/03/23 13:02, mikefc wrote:
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> Hi Paul and R-devel team,
> 
> There is an inconsistency in the definition of “grid.polyline” in 
> comparison to the other grid.* functions.
> 
> grid.polyline() simply passes all args (specified via … only)  to 
> polylineGrob() and unconditionally calls grid.draw() on the returned object.
> 
> In contrast, all other functions in the grid.* family have a full set of 
> named arguments (reflecting the arguments to the *Grob() form of the 
> function).  Internally to each of the grid.* family of functions, a draw 
> argument is used to enable/disable the drawing of the object at call time.
> 
> Is this a conscious choice?  Should grid.polyline() behave like the 
> other grid.*() functions?
> 
> Kind regards,
> Mike.
> 
> 

-- 
Dr Paul Murrell
Te Kura Tatauranga | Department of Statistics
Waipapa Taumata Rau | The University of Auckland
Private Bag 92019, Auckland 1142, New Zealand
64 9 3737599 x85392
paul using stat.auckland.ac.nz
www.stat.auckland.ac.nz/~paul/