plotting complex plane

[ThomasAdkins64]

I was an early purchaser of the HP Prime, and patiently waited until most of the firmware issues were doctored and fixed, and manuals were strengthened up.  Early on, I remember a post from somewhere (my photographic memory ain't working, today) the team admitted that any expression involving either 'i' (complex square root of -1) or (0,1) (which is an alternate representation) would be automatically rejected by the Advanced Graphing application. 

This still seems to be the case with the latest firmware update.  Can anyone please tell me if I'm mistaken?  It seems a crying shame not to be able to plot either the ABS() or ARG() of a complex function of the complex plane, since arguably this occurs much more often in the field of Electrical Engineering or even Mechanical Engineering than arbitrary plots of just X or Y. 

BTW, my HP-50 plots truth functions of the complex plane just fine, although slowly.  To add insult to injury, the error message seems to be a hold-out from earlier days when the development team was still trying to iron out more basic issues.  Why not just have "Cannot plot any expression involving complex numbers??"

Or best of all (wait for it) how about removing the restriction against having complex numbers in plotted expressions altogether, and add a warning message "Must convert complex expressions to a real number before plotting using either ABS() or ARG()" if someone forgets to ensure a real result to the expression?  This seems reasonable and appropriate for the worlds new HP flagship calculator.  

And, if anyone were in the mood to actually grant wishes, how about a differential equation plotting application, like competing calculators have?

[Maké]

Hi!, @ThomasAdkins64:

Welcome, to Forum !.

For differential equation plotting, you can see ... http://edspi31415.blogspot.com.ar/2015/11/hp-prime-geometry-app-tutorial-part-5.html

For complex numbers, can you explained better with one example ?.