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| visits | member for | 1 year, 3 months |
| seen | 8 hours ago | |
| stats | profile views | 121 |
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Dec 5 |
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Small random disturbance of a flat surface @acl, how do you plot Interpolation@Flatten[ Table[{{x, y}, 1 + .05*RandomReal[{-1, 1}]}, {x, 0, L + 1}, {y, 0, L + 1}], 1]? I tried putting it in a Plot3D function but that didn't work? Is that because its a Table now? |
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Dec 5 |
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Small random disturbance of a flat surface @acl your suggestion did work as an initial condition. I have to see what I can do about Vitaly's Spline initial condition. |
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Dec 5 |
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Small random disturbance of a flat surface @acl I think with a random number type ic, there would always be the ibcinc warning popping up. The whole SplineClosed->True helps with that. However, I am unable to use BSplineFunction in NDSolve as an ic. I was however, able to use ur suggestion with bsf = Interpolation@Flatten[ Table[{{x, y}, 1 + .05*RandomReal[{-1, 1}]}, {x, 0, L + 1}, {y, 0, L + 1}], 1] |
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Dec 4 |
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Small random disturbance of a flat surface @acl I have an inkling as to why I'm having an issue: my BSplineFunction isn't a function of x and y. How can I describe it to be a function of x and y? I think thats what NDSolve complains about when I try to use a spline surface. |
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Dec 4 |
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Small random disturbance of a flat surface added 73 characters in body |
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Dec 4 |
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Small random disturbance of a flat surface I am now almost certain that it isn't about boundary or initial conditions. I cant feed this spline into NDSolve is what is the problem. How does one do that? |
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Dec 4 |
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Small random disturbance of a flat surface @whuber Thank you. I'll look at the link. |
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Dec 4 |
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Small random disturbance of a flat surface I included an example. Maybe you can shed light on whats going on. |
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Dec 4 |
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Small random disturbance of a flat surface @whuber Sorry, but I barely understand the tech language that you just used. I've included an example with the bspline thingy and it errors out. |
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Dec 4 |
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Small random disturbance of a flat surface example provided |
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Dec 4 |
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Small random disturbance of a flat surface It probably is as I need to use Periodic boundary conditions. However, mathematica didn't scream at me that the initial and bound conditions are inconsistent like it would usually do for bad ics/ |
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Dec 4 |
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Small random disturbance of a flat surface @whuber Good point. However, this seems rather computationally intensive.. like you point out. |
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Dec 4 |
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Small random disturbance of a flat surface Well, using this as initial condition didn't give me agreeable results. My initial condition is h[x,y,0]==BSplineFunction[RandomReal[1, {10, 10, 1}]] for quite a complicated PDE... I'll see if I can include a simple working problem. |
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Dec 4 |
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Small random disturbance of a flat surface So is this correct: RandomReal creates a random number array in the range (0,1) which is 30x30. Then this is fed into BSplineFunction to create a spline curve? |
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Dec 4 |
asked | Small random disturbance of a flat surface |
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Nov 10 |
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How to determine the remaining sides given the three angles and one side of a triangle? @J.M. You seem to know a lot about Mathematica.... Are you skynet... er Mathematica? :P |
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Nov 5 |
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Calculating the mean curvature of a surface - suggestions @whuber +1! I'll do that. Calculate the curvature of a unit sphere. |
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Nov 5 |
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Calculating the mean curvature of a surface - suggestions @J.M. Oops! Will make the edit! |
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Nov 5 |
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Calculating the mean curvature of a surface - suggestions added 3 characters in body; edited title |
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Nov 5 |
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Calculating the mean curvature of a surface - suggestions @Artes I actually did. Doesn't seem to be the same thing. It does have certain functions that would be interesting though. |
