MaplePrimes - answers and comments on Question, Maple Commands for exp function?

exp() not e^

DJJerome1976 — Mon, 25 Feb 2013 07:38:12 Z

Maple does not recognize e^(y/x) as the exponential function. You have to use exp(y/x).

Singularity

Markiyan Hirnyk — Mon, 25 Feb 2013 11:58:41 Z

The function exp(y/x) has a singularity at the origin. This implies difficulties with its contourplot. In order to overcome these, we don't consider x belonging to RealRange(-0.1,0.1) :

> restart; with(plots); a := contourplot(exp(y/x), x = .1 .. 3, y = -3 .. 3, contours = [1, 2, 3], numpoints = 10^4):
> b := contourplot(exp(y/x), x = -3 .. -.1, y = -3 .. 3, contours = [1, 2, 3], numpoints = 10^4):
> display(a, b);

As we see, the contours are lines without the origin. See ?contourplot for more info.

even I use exp(y/x), the graph still looks

orangevocation — Mon, 25 Feb 2013 07:45:15 Z

even I use exp(y/x), the graph still looks the same.

Addition

Markiyan Hirnyk — Mon, 25 Feb 2013 13:42:49 Z

With the contours = [.5, 1, 2, 10] (PS. and coloring = [red, blue] ) options:

THANK YOU SO MUCH @Markiyan Hirnyk

orangevocation — Tue, 26 Feb 2013 07:18:18 Z

THANK YOU SO MUCH

@Markiyan Hirnyk

Don't mention it

Markiyan Hirnyk — Tue, 26 Feb 2013 11:48:44 Z

@orangevocation Don't mention it.