3D graphing

[Highdef]

I have a Math problem With 3 surfaces that i want to Draw/plot, but I can't make it work on the HP Prime.

The Problem:
S1: Z=0
S2: X²+Y²=4Y
S3: 4Z-X²-Y²=0

Is there a way to plot/Draw this in 3D?

[Thomas_Sch]

Please check GRAPH 3D v2.422 (21-DEC-2014) by Han.

[Highdef]

Thanks for the input Thomas.

I have tried this, but fail to see how this helps me. I don't get even near of how this is supposed tol look like. Attached.

Am I missing something?

[Han]

(02-11-2016 11:35 AM)Highdef Wrote:  I have a Math problem With 3 surfaces that i want to Draw/plot, but I can't make it work on the HP Prime.

The Problem:
S1: Z=0
S2: X²+Y²=4Y
S3: 4Z-X²-Y²=0

Is there a way to plot/Draw this in 3D?

Is the second surface (which I placed in bold above) a cylinder? If so, then it is not a function (i.e. cannot be expressed in the form f(X,Y)=<expression in X and Y> ). Graph3D currently cannot handle surfaces that are not expressible in the form of a function. You should be able to graph the other two surfaces fairly easily after rewriting the equations into the form Z=<blah> and just using <blah> as the formula.

[Highdef]

Thank you Han, that helped a lot.

Although it would be really nice to have something that could plot all of it I understand it's really not the purpose. Thank you for making this :-)