Hi there,

I'm trying to do a BodePlot of a transfer function for a Buck Converter. So I assign values for R, C and L, but when I try to run the Bodeplot function from the DynamicSystems package I get a:

"Error, (in DynamicSystems:-evalfSystem) symbolic value(s) in model: sCR, sL"

What can I do to fix this?

Hi,

I have to solve a very complex trigonometric equation which has 0,1 or 2 solutions between 0 and Pi (it depends from some parameters...).

The first problem I solved is to find the two solutions (when they exist), because at the beginning, the fsolve function returned only one solution. So, reading in your site, I solved this problem "splitting" che solutions domain in two parts in which I expect to find the two different solutions.

So for example a I wrote:

Three things - one being an possible business opportunity (albeit a small one) for Maplesoft ... ps. sorry for the lengthy talk

updates - Under the Table of Contents in the help Browser I can go to System -> Information -> Updates and find the What's New updates in all versions up to and including the one you're using.  Then at the bottom there are links to further explicit updates to which there are no links in the searchable browser (at least that I could...

Some years ago (on the old primes when there was a 'book' section), I had posted about Maple 401, a list of advanced functionality that someone serious about writing code in Maple ought to know.  But that list is not particularly current (it probably was not completely current when I created it), as I did not keep up my in-depth knowledge of more recent releases of Maple.  So my question is: what is this list

Hi everybody,

I have just started to learn using maple and now I have a trouble.

I thought programming was similar to C language, and I tried to write this simple code:

> restart:
> a := 2;

   b := 5;
> 
> for i from 1 by 1 to 4 do

   if a = b then 

        print('before'); 

        plot(x^2, x = -2 .. 2); 

        print('later')

   end if; 

Greetings All

I have several equations and each have their own individual frequencies and amplitudes. I would like to sum the equations together and adjust ONLY the individual phases, phase1,phase2, and phase3 to keep the total amplitude value of eq_total under a specific value like 0.8. I know I can normalize the signal or change the vertical offset, but for my purposes I need to have the amplitude controlled by changing/finding the values for just...

Hi everybody, I have a rather large code in Maple for my research which needs fast eigensolving for large sparse matrices, thus, I am using the Matlab link to parse my matrices and get them eigensolved in Matlab. The problem is that, I am unable to directly parse a Maple sparse matrix to a Matlab sparse matrix which substantially slows down the calculation.

This is the best I can do so far:

> H:=Matrix(5000,5000,shape=symmetric,storage=sparse,datatype=float[8]):

i want to use the new point's (c) coordinates but how can i correct this? thank you for helps.

a:=point([1,0,0],color=red,thickness=6):

c:=animate([rotate[a,alpha,[[0,0,0],[px,py,pz]]]],g2=0..2*Pi):

cx,cy,cz:=animate([op[c][]],g2=0..2*Pi):                                                                                                                                        

Error, cannot split rhs for multiple assignment

Hi there,
my problem is the following: I have a polynomial p(alpha,beta,lambda_1,lambda_2,w). What I want to do is express it as p1(alpha,beta,lambda_1,lambda_2,w)+(alpha-beta)*p2(alpha,beta,lambda_1,lambda_2,w). I have done it manually and I have succeeded, but since I need to do the same for larger polynomials, I was wondering if you knew any way of doing this with Maple.

Thank you very much

I have written lists of parameter values and functional forms which I read at the top of the worksheet and use subsequently when I need numerical output.

For instance,

Parameters1 := [ s = 2 ];
Functions1 := [ U = 'proc(c) (c^(1-s)-1)/(1-s); end proc' ];
eval(eval(U(c), Functions1), Parameters1);
                             ...

Download dgil.mw

Hello,

I'm trying to solve a derivation of a function, that consists of parameters and varaibles (i want to find the value of x that setup the derivation to zero).

The solve function give me starnge results..

Follow up the file.

Can someone suggest me another solution to the problem?

Thanks 

Gil

Hello!

Could you pleasу tell me, is it possible to make MapleSim not to simplify equation set of my model and solve equations without simplification? I want to do this because simplification process (reduction of equations number) takes too much time in comparison with integration process.

Thank you!

Hi all,

I have a set of two coupled PDEs and Maple keeps giving me invalid initial/boundary conditions. I really don't know how to fix it. Attached is my worksheet. Please help me out.

Thank you

2dcase.mw

I'm very new to this... I need to find the total derivative of y=(a-3)/(b+3) given that a=r*t and b=s*t

This is in a similar vein to the Diet problem (integer programming), but harder.

http://en.wikipedia.org/wiki/Cutting_stock_problem

This guy has solved this problem using 3 programs, Maxima and LPsolveIDE and Excel:

https://docs.google.com/View?docid=dfkkh8qj_64rrpz86db

A text file generated by maxima is fed into LPSolveIDE ...