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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
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
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
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
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
comment How to solve a system of partial differential equations?
@Szabolcs Yes, I was just trying to verify things...was planing to write something but have to make coffee first :) btw, Maple is able to solve it in its current form without rearranging: screen shot !Mathematica graphics
Feb
14
comment How to solve a system of partial differential equations?
Here is something more strange. Try DSolve[{D[f[a, b], a] == 0,(1/a) D[f[a, b], b] == 0},f[a, b], {a, b}] and it can't do it. Now remove the (1/a) from the second equation, (which is the same as multiplying both sides by a, then it solves it !
Feb
14
comment Minimum in a nested list
Cases[mya, x_ /; x[[3]] == Min[mya[[All, 3]]]] is another option
Feb
11
comment How do I plot a variable against another variable in Mathematica?
what is d .....?
Feb
10
comment How can I terminate a running computation in Manipulate?
@Kuba I see. I wonder if this supposed to be faster/better than using N@ ?
Feb
10
comment How can I terminate a running computation in Manipulate?
whyare you multiplying by one here 1. Total[Log@Range[range]] what does 1 do ?
Feb
10
comment Jacobian matrix formation from polynomial expressions
see if this helps mathematica.stackexchange.com/questions/5790/…
Feb
10
comment Overlay graphic3d and ListPlot3d
Grafico = ListPlot3D[{idatinuovi}, what is idatinuovi? It is not there any way. It is also better to update your question itself and post code there instead on in the comments.
Feb
10
comment Need help with solving a second order differential equation
You won't be able find closed for solution for this. First, it is non-linear. Second, there is removable singularity at $x=0$, and third is is a boundary value problem. You can try a Frobenius series solution and see if this works. Or just try a numerical solution. Even that requires some work to get right. Screen shot !Mathematica graphics
Feb
9
comment Labeling points on a graph with their coordinates in parentheses
good solution but too much white inner spacing in there between the numbers. If these good be squashed closer they will look better.
Feb
8
comment Find positions of items in a list based on neighbours
Use, Position and find() are similar in this case (I've solved this also in M using Position and Cases, but solutions shown here are nicer than what I have). Matlab's find() actually is more flexible than M's Position[]. I mentioned this before, as it can return more information than just the position, it also can return the corresponding values found at those positions. In M, one has to use Positions and then use Extract. Here is Matlab's help on find() mathworks.com/help/matlab/ref/find.html May be in V10, they'll add an option to Position to do the same :)
Feb
8
comment Find positions of items in a list based on neighbours
nice use of MapIndexed. since all the good answers are shown, I tried this in Matlab to see how it will look like, here is the answer: !Mathematica graphics Matlab does not have pure functions (at least not as they work in Mathematica)
Feb
8
comment Applying Labeled Option to Multiple Options
@m_goldberg yes, that is a nice way to do it as well. As typical in Mathematica, there is always at least 10 ways to do the same thing :)