Re: Plotting piecewise in 2D
- To: mathgroup at smc.vnet.net
- Subject: [mg109751] Re: Plotting piecewise in 2D
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Fri, 14 May 2010 19:58:06 -0400 (EDT)
Because it is hard to see a point?
However, the following shows an excessively large area:
DensityPlot[
If[Abs[x] < 0.001 && Abs[y] < 0.001, 1000, 0],
{x, -1, 1}, {y, -1, 1}]
"If" is a programming construct not a mathematical function. Piecewise works better.
DensityPlot[
Piecewise[{{1000, Abs[x] < 0.001 && Abs[y] < 0.001}}],
{x, -1, 1}, {y, -1, 1}]
Bob Hanlon
---- Jim Lambaugh <lambaugh at gmail.com> wrote:
=============
Hi
Please take a look at
DensityPlot[If[x == 0 && y == 0, 1000, 0], {x, -1, 1}, {y, -1, 1}]
This just gives me a uniform plot. Why does the peak at (0,0) not show
up?
Best,
Jimmy.