GROBW/GROBH vs GROBW_P/GROBH_P

[Didier Lachieze]

As explained in the manual (and the on-calc help) under Drawing:

Quote:There are two identical sets of functions that can be used to modify graphic variables. The first set of them work based on Cartesian coordinates using the Cartesian plane defined in the current app by the variables Xmin, Xmax, Ymin, and Ymax in the Plot setup. The rest work on absolute pixel references based on the physical display of the HP Prime. For these functions, (0,0) is the top left pixel of the GROB, and (320,1240) is the bottom right. This second set of functions—those that work with pixels—have a _P suffix attached to their name, as in ARC_P and LINE_P.

So GROBH and GROBW return cartesian dimensions, not pixel dimensions as GROBH_P and GROBW_P.

For example, compare {GROBW_P,GROBH_P} with C→PX(GROBW/2,-GROBH/2)