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1d
comment What are these strange shapes in my Plot3D[]?
@YungHummmma could you share your NIntegrate code?
1d
comment What are these strange shapes in my Plot3D[]?
@YungHummmma Yes, I would suspect so.
2d
comment What are these strange shapes in my Plot3D[]?
Are you plotting the result of an NDSolve operation? If that is the case, you are trying to perhaps probe a time step of your equation beyond the limits imposed by numerical stability/stiffness for the solver type being used. Conjecture, at best.
Apr
11
comment Solving a nonlinear, second order d.e. in Mathematica
@Funzies what was the error your received with NDSolve? I am trying to solve this with a stiff solver such as LSODA and I've been receiving an NDSolve::berr error
Apr
11
comment Solving a nonlinear, second order d.e. in Mathematica
@LeonidShifrin NDSolve stiffness, story of my life! I found that using Method->"LSODA". I let the "MaxDifferenceOrder" "float". Given your hightened understanding of this problem, do you have any comment on my positive experience with "LSODA"?
Sep
6
comment Modelling the effect of a structure on a “tsunami” (hyperbolic wave equation)
@Kuba Very interesting answer that was!
Sep
6
comment Modelling the effect of a structure on a “tsunami” (hyperbolic wave equation)
Very interesting! I'll see how this cranks out on my computer.
Aug
7
comment How to demonstrate lack of stability with advection equation
Why when I increase the MaxPoints while holding MinPoints constant, does the error increase? I would assume the reverse should happen...
Aug
7
comment How to demonstrate lack of stability with advection equation
Thank you. So is it difficult to back-out a "CFL" number out of this example when one uses mathematica since mma always "sets/adapts spatial grid resolution"?
May
13
comment Reversing the ColorScheme used in an ArrayPlot and setting the font size in the color bar
You might want to change rData to FData.. Thank you though, the essense of the answer still exists.
May
13
comment Reversing the ColorScheme used in an ArrayPlot and setting the font size in the color bar
Thank you. I would have never thought of this.
May
13
comment Reversing the ColorScheme used in an ArrayPlot and setting the font size in the color bar
How do I change the font size of the text in the colorbar? I was using BarLegend for that purpose... ArrayPlot[mat, PlotLegends -> BarLegend[{GrayLevel, {0, 1}}, LabelStyle -> {FontSize -> 20}]]
May
13
comment Reversing the ColorScheme used in an ArrayPlot and setting the font size in the color bar
@belisarius Mathematica 9.0... Will make the edit
May
10
comment Changing FrameTicks of ListPlot
@BoLe Useful! Thanks!
May
10
comment Changing FrameTicks of ListPlot
This is rather interesting. I didn't think that "specifying my data differently" outside the plot function would help me...
Apr
30
comment Contour heat graph (ListContourPlot?)
Aaah Mathematica 9!!! Your PlotLegends is now fixed.... it was so messed up in Mathematica 8.0
Apr
22
comment Problems with NDSolve and stiffness
Would it help if you blindly switched to the LSODA method? I generally noticed that the LSODA is quite forgiving and pushes stiff equations towards a "solution" better than the BDF at the very least.
Apr
19
comment Using FindRoot with an interpolating function
What if I were to have more than one crossing and I still wanted to use FindRoot[...]. I noticed that FindRoot[...] doesn't allow for more than 2 guess values. I can use an {x,xmin,xstart,xend} but that didn't quite help.
Apr
19
comment Using FindRoot with an interpolating function
@BoLe And to answer my own question, I just used the minimum and maximum x limits as my guess values. I think that does the trick.
Apr
19
comment Using FindRoot with an interpolating function
@MichaelE2 I modified my code. I used Interpolation[Flatten[curve1,1],x]. This worked. I forgot that I needed to tell it to use x :P