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Topic: Any way to get gradient lines as well as contour lines?
Replies: 4   Last Post: Feb 4, 2013 1:25 AM

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James Stein

Posts: 130
Registered: 5/8/10
Re: Any way to get gradient lines as well as contour lines?
Posted: Feb 3, 2013 8:20 PM
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Google for the two words Mathematica relaxation and you may find some
useful ideas, for example:

On Sat, Feb 2, 2013 at 11:48 PM, Chris Young <> wrote:

> I'd like to be able to plot "gradient lines", i.e., lines of steepest
> descent, on plots of functions of x and y, f(x, y). The contour lines
> can be obtained via MeshFunctions, as in
> Plot3D[Sin[x + y^2], {x, -3, 3}, {y, -2, 2}, MeshFunctions -> {#3 &},
> Mesh -> 5].
> I'd like all the lines at right angles to these contours.
> There must be some way to use the gradient function and then integrate
> to the get the gradient lines.
> Maybe this is difficult to do, in general. Also, maybe in general the
> "gradient lines" wouldn't be continuous.
> But I wonder if it could be done for some simple examples.
> Any suggestions appreciated.
> Chris Young

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