38,219 reputation
554157
bio website
location
age
visits member for 2 years, 4 months
seen 2 hours ago

Jul
21
answered Convolving data set with gaussian profile
Jul
21
comment How can I prevent a compiled function from using uncompiled evaluation?
@JasonB, please add that solution as an answer - it is valuable and shouldn't be hidden away in a comment.
Jul
21
answered Find sublists of a list that match some conditions
Jul
21
comment Why do quote marks appear in output when saved with Save Selection As?
Strange. I get the quotes if I select the cell contents but not if I select the cell bracket.
Jul
21
comment Can't plot rotated region
@user21, email sent.
Jul
21
comment Invert 3D objects (shape) to 3D patterns objects (shape)?
The RegionPlot3D example in your comment is very easily inverted. The region function r[x,y,z] simply returns True or False according to whether the point {x,y,z} is inside the region or not. So to invert the volume you just need the boolean Not operation, i.e. use RegionPlot3D[ !r[x, y, z], ...]
Jul
21
comment Invert 3D objects (shape) to 3D patterns objects (shape)?
The example in your question is rather unclear, because SphericalPlot3D plots a 2D surface embedded in a 3D space. You may choose to conceptualise this surface as the interface between a solid volume and a void, but then the inversion won't change anything - the surface separating the solid from the void remains the same.
Jul
19
comment Can't plot rotated region
For me even the first basic example in the TransformedRegion documentation doesn't work properly. And the second example hangs the kernel...
Jul
19
comment DeleteDuplicatesBy is not performing as I'd hoped. Am I missing something?
I note that for an association argument there are four conversions!: assoc -> list -> assoc -> list -> assoc
Jul
19
comment Excluding region with `RegionDifference`
The first time I tried it, it crashed the kernel. The second time I got the correct result. Windows 7, v10.0
Jul
18
awarded  Enlightened
Jul
18
awarded  Nice Answer
Jul
18
answered How can I plot a Chebyshev spiral?
Jul
18
comment How can I plot a Chebyshev spiral?
PolarPlot[Evaluate@Table[n+ChebyshevT[n,t/Pi-1],{n,0,20,2}],{t,0,2Pi}]
Jul
16
answered Increase 3D Graph thickness for 3D printing in Mathematica?
Jul
16
awarded  Enlightened
Jul
15
comment How to simultaneously change the color and thickness in ContourStyle?
I think my parents had that wallpaper in the 70s :-)
Jul
15
answered How to simultaneously change the color and thickness in ContourStyle?
Jul
5
comment 256 Shades of Grey
You might want to check the adjustment of your monitor, see here for example. Do you see the steps across the whole range from black to white or just at the black end?
Jul
2
awarded  Curious