I want to calculate iterates for the Logistic map using the maple's symbolic computation. e.g., 

x1=a*x*(1-x):

a1=a+w:

x=x1:

a=a1:

In order to keep track of the error that builds up in each step.  But the main trouble is that it takes very long time to calculate the same even for 100 iterates. What could be the possible method to make my program efficient ? 

Please do not answer in terms of using high precision technique as I am more interested in doing it symbolically.

Hello,

I have one calculation and the result is "Length of output exceeds limit of 1000000"... What can I do with this error?

Thanks a lot.

Another pointplot3d animate problem

when the axes option is not specified the view option magnifies the symbols when symbol=circle
The field of view is not increased as it should.

animate(pointplot3d, [[[1, 2, 3], [4, 5, 6], [2, 2, 2]], color = blue, symbol=circle, orientation = [A, A]], A = 45 .. 405, view = [-100 .. 100, -100 .. 100, -100 .. 100], frames = 100);

 This is in Maple 12, I haven't checked to see if it exists in newer versions of Maple. 

Hi

I started my university project 5 months ago and working with maple from that time.

I used maple help to solve my problem but for this one I could not.

I have equation system with 4 equations and variables are for example x y z w .

The problem is I  have  xy  x^2  x^3  yw   in my equations so maple with solve could not solve that.

On the other hand,the equation are parametric and non numeric...

Hi, all,

I am wondering whether Maple have the capacity to compute boolean operations containing variables. 

For example, I want to compute (a1*b0)xor(a0*b1), is there a way to do that. I know Maple has "Xor" command to compute the xor of two given numbers. Is there a way to do that over variables?

thanks a lot 

Gepo

Motion_of_a_Charged_.mw

Hi,

The procedure I uploaded, was originally written in C++. I made a text file and plot the file with C++ without any problem.

But in the maple version of the same program, when I use the command:

                          ...

Hello all,

I'm a new user, hopefully you can assist me as I have work on this problem for quite sometime, I keep getting error of Error, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system

I copy my work here. If anyone need the original worksheet I can send this immadiately. Please help and I would like to say Thank you.

R:= 8.31434;             ...

Hello all,

I'm working through an optimization problem, and I'm running into a problem adding constraints on the variables I am trying to optimize. I'll attempt to ask the question in a general sense, but if it's not clear, I'll be more specific.

I have a procedure called EIG that calculates the sum of the squared residuals of a model compared to experimental data by inputting 6 variables. I'm trying to minimize this function by using the Optimization...

So I've solved this system of ODEs already in a certain gauge where h[r](r) was set to zero, and my answer was consistent with a previously calculated solution, but now I'm trying to do it with a non-zero h[r](r).

The previous result Maple easily solved with dsolve, but puting that in this time, I get:

ode := [-1/2*(4*h[v](r)*r+4*h[r](r)*r-2*diff(h[v](r),`$`(r,2))*r^3-2*h[2](r)*6-2*h[r](r)*6*r+diff(h[2](r),r)*6*r+4*h[2](r)-2*diff(h[2](r),r)*r)/r^3=0,

Hi

I need to insert a legend in a Pie chart, but I want to do it from the command line:

> with(Statistics);
> T := [algodón = 26, lana = 5, tabaco = 7, fruta = 9, arroz = 13, té = 5, carne = 14, otros = 21];
> P := PieChart(T, sector = 0 .. 360, color = ["red", "Orange", "yellow", "green", "ForestGreen", "blue", "MediumPurple", "LightBlue"], captions = relative);
> plots[display](P, title = ["Distribución de las exportaciones...

Is it possible to switch between worksheet mode and document mode? If yes, how?

Hi everyone;

I would like to solve these ODE's.

1) d/dX(X*dΘ/dX)+ρ^2*X*Θ=0;Θ=Θ(X),ρ=constant

2)d/dr(r*d/dr(φ)-m^2(r*φ-n/m^2)=0;φ=φ(r),m,n=constant

Boundry Conditions are:

1)d/dX(Θ(L))=0,  2)Θ(0)=φ(R), 3)d/dX (Θ(0))+d/dr(φ(R))=0, 4)d/dr(φ(0))=0,   R,L=constant

Two of boundry conditions are Joint

Thanks

My question is in regards to the events feature in dsolve numeric.

At a particular event time, I was wondering if it is possible to call a previous moment, that is something like

eq:={ diff(y(t),t) = y(t) };

ic:={ y(0) = 2 };

de:=dsolve( eq union ic, numeric, events=[[ t =5, [ y(t) = y( t - 2 ) ]]],range=0..10);


If it is possible to "globaly" declare previous steps of the dsolve, I believe that the above de would work. However,...

Hello,

I have this relatively simple 4 equations which I am trying to solve simultaneously. But for some reason Maple just returns a pair of empty square brackets as solutions. "[ ]" like this.

I have uploaded the Maple Worksheet for your convenience. It would be very helpful if anyone can take a look at it and point out out the problem. Thank you.

Simultaneous_Eq.mw

Hi, im Gabriel from chile, and probably my english wouldnt be very good :P.

Im working on a problem that needs to be solved numerically, its a set of coupled non linear equations. Im succefull in finding the solution given a set of initial conditions, but the problem I have is when I try to save those solutions.

I want to save them in a .m file to fully recover it when I start the session again (it take some time in find the solution, and I have to iterate the...