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Feb
22
comment Prevent FullSimplify from converting trigonometric expressions to exponential
A small example that shows the problem you have?
Feb
22
reviewed Approve Extract coordinates from a polygon
Feb
22
comment Explicit multiplication * sign in Mathematica
may be Clear[x, y]; expr = x y; FortranForm[expr] gives x*y then you can give this to Maple. ofcourse you have to test this more to make sure it works for your other expressions.
Feb
22
comment Extract coordinates from a polygon
Since you created the polygon, then you must have its coordinates already? it helps to post a complete self contained example that shows the order of the operations, and not bits and pieces since that makes it hard to follow the logic.
Feb
20
comment How to apply Robin boundary condition in Mathematica
I am just guessing really that FEM will be in V 10. Only someone in WRI would know for sure. But if you type ?"NDSolveFEM*" you'll see all the hooks there. See mathematica.stackexchange.com/questions/3292/what-is-ndsolvefem (its been there since V8, so one would expect it is ready by now :)
Feb
20
comment How to apply Robin boundary condition in Mathematica
btw, I just looked at your B.C. (before I just saw you mentioned Robin BC in title.) the B.C. you show is not Robin. In Robin, BOTH Dirichlet and Neumann exist on the same region. What you have above is really a mixed B.C. and not Robin. btw, wait a little bit for Version 10, hopefully it will have finite elements support finally and one can expect to solve these problems much easier with FEM new API
Feb
20
reviewed Approve Parallel evaluation of Image and Rasterize problem
Feb
20
comment How to apply Robin boundary condition in Mathematica
THere is a notebook here that has an example ekayasolutions.com/UCDMath/PDEApplications.php (using finite difference).
Feb
20
awarded  Electorate
Feb
20
comment Formatting an equation on a plot
The whole issue of formating on plots and graphics in M really needs an overhaul. There should be a simple way to use Latex directly to do this. Matlab supports using Latex directly for plots. I do not see why M can't do the same.
Feb
20
comment Implementing a Beeswarm plot in Mathematica
may be you can use RLink to call that R function from M? reference.wolfram.com/mathematica/RLink/guide/RLink.html and do you do not have to have an implementation in M for it.
Feb
20
revised Formatting an equation on a plot
code was overflowing outside
Feb
18
comment Slider resistance and Play-Pausing with Manipulate, TabView, and attempt an granular TrackedSymbols?
@PeeterJoot As it stands, Grid does nothing. I must had some text or something else I wanted to add and left the Grid there. I use Grid always as the base for setting up/laying out everything. In this case it can be removed with no effect.
Feb
18
awarded  Vox Populi
Feb
16
comment Using NDSolve for three variables as function of time
I am really confused looking at the above code. You have only one differential equation there. dz/dt so why are you trying to solve for 3? You are also defining Pb[t] in terms of r[t] and also defining r[t] as function of Pb[t] which looks like a circle to me.
Feb
16
comment How to change the format of FrameTicks
Try this first and then redo the plot. SetOptions[$FrontEndSession, PrintPrecision -> 6] screen shot !Mathematica graphics
Feb
15
revised How to solve a system of partial differential equations?
add small note on Consistency
Feb
14
revised How to solve a system of partial differential equations?
added 275 characters in body
Feb
14
comment How to solve a system of partial differential equations?
@Szabolcs I am not really sure. I think Sage and Axiom and Fricas can. But maybe not Maxima, but I really can't be 100% sure without researching this. I only play with M and sometimes Maple. But good question. I googled little and do not see something on this now. Would require more time to find out.
Feb
14
answered How to solve a system of partial differential equations?