User Portlet User Portlet

W. Craig Carter
Discussions
It is not quite clear to me what you are asking. (first, your syntax is a bit off. You probably want to use a symbol for the lhs, not Grad (f).). A gradient is a vector. When you say "smallest", do you smallest magnitude? And, assuming the...
Try DensityPlot3D. The Documentation is your reliable friend. [DensityPlot3D][1] [1]: https://reference.wolfram.com/language/ref/DensityPlot3D.html
I tried Ulrich Neumann's suggestion of the stackexchange link you gave and it works just fine. To be explicit: Vpot[p_, r_] := Piecewise[{{p[r]^2/(4*Pi), p[r] = 109/ 250}, {(86031603 + 640*Pi*(217 -...
Szabolcs is a bona fide Mathematica expert and I am reluctant to post after him. Nevertheless, here is a way that may help you understand how you might want to use Dynamic to achieve the display-both. Dynamic[{data, listPlot}] ...
I interpret your question as find the extrema of the function f[x,y] where x and y lie on some curve. In that case: f[x_, y_] := 10 Log[x^2 + 2 y^2 + 1] - x^2 - y^2 Plot[f[Cos[t], Sin[t]], {t, 0, 2 Pi}] Plot3D[f[x, y],...
Differences between u[x,y,t] vs. u[x,y][t] vs. u[x][y][t].
Hello, I am not sure if I understand your question, so please excuse my answer if I have misunderstood. How about something like this: With[{points = SpherePoints[24], length = 10}, Manipulate[ Graphics3D[{{Yellow, Opacity[0.5],...
LIkely something that crept into Google's n-gram data base through latin https://books.google.com/ngrams/graph?content=eminem&year_start=1800&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Ceminem%3B%2Cc0 Via latin: ...
Thanks, George, for the tip on sidecar. I've been using Wolfram Player to look at the documentation. But, I believe the documentation is not being stored locally. In any case, navigating the documentation is very slow and the openers are not...
Hi Seth, Any updates on the book? I know such things take longer than expected, but it will be very useful. WCC