Re: Plot3D question
- To: mathgroup at smc.vnet.net
- Subject: [mg70687] Re: Plot3D question
- From: Bill Rowe <readnewsciv at sbcglobal.net>
- Date: Mon, 23 Oct 2006 02:50:19 -0400 (EDT)
On 10/22/06 at 1:19 AM, dimmechan at yahoo.com (dimitris) wrote:
>I would like to apologise for the mistakes which obviously contained
>my previous post. Here comes the correct one:
>---------------------------------------------------------------
>I would like to know why the Plot3D function does not complain about
>the following command (note there is a singularity at y=0)
>Plot3D[Sin[x]/y, {x, -10, 10}, {y, -10, 10}]
>whereas it does complain (a lot!) about the following
>Plot3D[Sin[x]/y, {x, -10, 10}, {y, 0, 10}]
>I believe it has to do with the non-adaptive algorithm used by
>Plot3D, but even the command
I believe Plot3D always samples at the end points of the
variable range. So, in the first example the singularity doesn't
cause a problem as Sin[x]/y is not sampled at y = 0. But in the
second example, the singularity is an end point for y and is sampled.
>Plot3D[Sin[x]/y, {x, -10, 10}, {y, -10, 10},PlotPoints->100]
>does not change the behavior.
Which should be expected if I have the correct understanding of Plot3D.
--
To reply via email subtract one hundred and four