Advanced Graphing error?

[Jan_D]

I think that this is a bug.
I do not have the impression that the Advanced Graphing app uses the CAS very much or at all.

But we can easily correct it by replacing 3Root(x) with SIGN(x)*3Root(ABS(x))

When you just want to plot the function y=3Root(x) you could also use
(X<0 AND y=-3Root(-x)) OR (x>=0 AND y=3Root(x))

Or
x=y^3

When we only want to plot functions the Function app is better.
The Advanced Graphing app is very good in plotting complicated relations between x and y, but the Function app can do some things it can not do.

For example, you can write a program which defines a function and you can let the Function app plot it.

The Function app can also deal with complex numbers.
Of course it can not plot complex numbers, but it can plot its real or imaginary part, like RE(1/(x+i)) or IM(1/(x+i)). Also ABS(1/(x+i))

It does this very nice with y=(-1)^x
It plots this function correctly by only plotting the discrete points at positions (2n,1) and (2n+1,-1).
When we check the complex checkbox in Home settings we can also plot RE( (-1)^x), which gives a COS graph, IM( (-1)^x), which gives a SIN graph and ABS( (-1)^x) which gives a straight line.