Hi people!

Why there is not a "Modelica.Mechanics.MultiBody.Joints.RollingWheel" (different from 1-D mechanics rolling wheel) in MapleSim 5? It is previewed in the Modelica language and SystemModeler has this implementation.

Is there a way to import the model o this joint from somewhere? If not, how could I model this non-holonimic constraint in MapleSim? 

Thanks! 

Hello,

I want to build a paper model of an immersion of real projective plane made out of paper strips. I want to use maple to plot the curves which represent the paper strips. I have written a code shown below which computes the curve for one of the strips. In this code, alpha is set to Pi/2 and the computation goes through. However the computation should be performed for various alpha. But if I set alpha=0, then f (see code below) is not computable, if I set alpha=Pi/4,...

Hi there.

I build a costum component on maplesim. It has 2 inputs and several outpus, like this:

As you cant see i get an error. At this simulation the constant where is probe1 is k=4. I have good results if n=2-~3.5. But what is strange is that if instead of a constant input n=4, i use a...

A user recently sent to me a Maplet that includes the display of an array of plots. This maplet works fine when run under the classic interface but not under the standard interface. As I tried to understand this problem I believe I have narrowed it down to a difference in the way the classic and standard interfaces handle an array of plots.

The attached worksheet is a very simplified example that shows the problem. What should happen is that pressing the "Plot single" button should show a single graph, pressing the "Plot array" button plots the empty axes, and pressing the "Plot displayed array" button displays a 2x2 array of plots. The second and third buttons illustrate the need for "plots:-display" in the action definition for this button.

Unfortunately, this works only in the classic interface. In the standard interface the "plot displayed array" button does not display anything. I should add that it appears to work correctly when exported as a .maplet file and run with the Maplet Viewer.

I have uploaded the worksheet: PlotArrayMapletDem.mw

I'm trying to compute the rank of large, non-quadratic matrices modulo p=2,3,5 and 7.

For matrix-sizes of (approx.) 20000 x 20000 everything works fine with Rank(p,M) of LinearAlgebra[Modular].

But for (approx.) 40000 x 40000 even the parsing of the matrix is not finished after 5 days (for 20k x 20k this takes 1 or 2 hours) . The system I use has enough ram, so no swaping is involved.

First question: I expected the parsing to be O(n^2), why is this not the case?

In matlab, a function is returned a structure H, say H.a, H.b, ...

In maple, I want to call this matlab function, but what returned to maple is a Record:

Hs:= getvar("H");

Hs:= Record(a=..., b=..., ...);

So how can I convert this record to a normal maple array? so I can access to each element by Hs[1]. 

Thank you

Kyle

Hi there, I'm trying to pass some calculation to Matlab then retrive the result by getvar(), but seems something is getting wrong.

my matlab function is very simple:

function out =maple_fun(a, b)

out = a + b;

return

this function is saved as maple_fun.m.

in Maple,

restart:
with(Matlab):
openlink():
DirectoryLocation := " cd  '/Users/Kyle/Documents/MATLAB/'  ":

Useing the following procedure I'd like to collect a set of  roots in a list of lists, so they can be manipulated and presented in various plot options. Some of which could be very interesting (to me only perhaps).

One option is to create a loop which produces values of newton roots x0 for a given function. For example:              f:=x->(x^7)-5

for x from -1 to 1 by 0.05 do

Hello,

I'm solving a system of 3 second order ODE's for 3 unknown functions, using dsolve. But in the output, I receive various sets of solutions which contain only 3 constants of integration. A friend solved the same system but in Mathematica, and received more constants of integration. 

I guess this has to do with the issue that Maple omits additive constants of integration almost everywhere. 

Is there some solution? i.e. some way of using...

I am looking for a numerical scheme which can easly handle such type of problem.

I already had the analytical results of this problem, now I want to know how to treat this problem numerically.

Any idea, then please let me know.

Thanks

with(SumTools):
He := sum(((-1)^k)*n!/(k!*(n-2*k)!*2^k)*x^(n-2*k), k=0..n/2);
Gen := simplify(sum(He*z^n/n!, n=0..infinity));

convert(Gen, ratpoly);

Hi,

I have an inverse kinematics model for a double inverted pendulum. There are multiple solutions for each joint angles due to symmetry and I have to choose the appropriate ones. I thought I can use the previous choices and compare them with the current multiple solutions, so I could choose the ones which are closer to the previous ones. However, since the double inverted pendulum moves in in both region at the equilibrium, this aproach does not work. Could you advise...

I watched a webinar by Dr. Robert J. Lopez, titled "Algebra, Trig, and Precalculus Math – All by Syntax-Free Maple".

In it he says he will give his email at the end if anyone wants the worksheet he is using during the webinar.  

I don't think he ever gave his email and, as a Precalculus teacher, I would really like the worksheet.  Please advise.

Hi maplers

I was wondering if it is possible to change default document template and startup code?

/Delkrak

How to construct the decomposition-field of the polynomial x^4 + x + 2 over GF(11,1), where GF(11,1)
is Z[11] = Z mod 11 (see ?GF for more info), in Maple?