## How to animate phaseportrait...

I tried > with(plots): with (DEtools); A:=phaseportrait(...); # equation and initial conditions depend on parameter s; phaseportrait works. All my attempts to make animation animate(A,s=-1..1,frames=10); with frames=50 resulted in errors Error, (in DEtools/phaseportrait) invalid specification of initial conditions Error, (in plots/animateb) Third argument must be a range in this case Any suggestions? Thank you very much in advance

## Help...

I have been trying to understand the example examples/Optimization LSSolve section (at the bottom) and use it for different data and a different equation, i only want to find residues for omega_o, F, m and b not omega in the equation F/sqrt(m^2*(omega^2-omega_0^2)^2+b^2*omega^2) How do i just find residuals for these four unknowns only. Thanks

## How do I give a boundary condition in terms of a v...

Hello to all users, I have a ode ode2 := (diff(psi(x), x\$2)))-lambda^2*psi(x) = 0 The boundary conditions are that the value of the function at x(L1) = psi1 and the derivative of the function at x'(L2) = 0 (insulation cond for the heat problem). I can get the solver (dsolve) to work if I give a numerical value for L2: bcs2 := psi(L1) = psi1, D(f)(10) = 0 However I want it to work for a general case. Can this be done? Thanks, Arya

## Can I plot Error Bars?...

I am new to Maple, but i have done some basic graphing, scatteredplots etc. but I wanted to know if I can plot error bars in my graph? Is there any function or a way define in Maple 10 to do so? Help will highly be appreciated. Amini

## Newbish question, issues with plots[multiple]...

Running into this problem, im trying to graph concentric circles (think planets) with a set radius and a set amount of time used to complete one orbit. I am using parametric equations with t being a value of time in terms of one complete orbit. However, when I try to graph these circles using plots[multiple] I get error codes. Heres my text~ We have our 5 planets, A - E orbiting around the sun affixed at the origin. We can easily graph these together to give us an idea of the orbit and time required to complete one. > plots[multiple](plot, > [0.71 cos(2.985074627 Pi t), 0.71 sin(2.985074627 Pi t), t = 0 .. 67],

## Gauss elimination for band matrix...

i have a program to write and i dont know how to do it. if anybody could hwlp me cheers. Q implement a computer program which fora given positive integer n, a given square matrix A of order n and given vector b which n components, decides whether A is a band matrix with p=2=q and in the positive case solves the system of equations Ax=b by simplification of Gauss Elimination for a band matrices with p=2=q

## Why does ifactor work so quickly?...

Please could somebody explain the process Maple uses to factor integers so quickly? Thanks Matthew

## What Happened?...

What happened to my post in this thread; http://beta.mapleprimes.com/forum/maple-doesnt-find-solution-but-plots-the-solution#new I used the HTML conversion tool to upload a worksheet. When I enter the page now, I can download the worksheet, but the in-line all I see is alternating Bold and Normal text saying "Maple Equation". Am I the only one to see this, or has my upload failed? Does this have anything to do with the New Mapleprimes Filemanager MapleNet implimentation? I've also got a signature, but do not see it after my comment? What have I done wrong? Thank you!

Hello everybody, I have Maple 9.5 and Excel 2003 on my laptop. Unfortunately, I always get a runtime error 53 when trying to load the Add-In, telling me that the manager cannot find the Add-In although it is loading the toolbar for Maple within Excel. Can somebody help me solve the problem? Is there a patch available for this? Cheers, Fox

## Volumetrix 3d plots in Maple...

HI. I hope anybody can help me. I have in parametric form a volumetric element in space: >restart: >A:=(r,theta,phi) -> [r*sin(theta)*cos(phi),r*sin(theta)*sin(phi),r*cos(theta)] where: r in [1,3], theta in [Pi/4,Pi/3], phi in [0,3*Pi/4] I know want to plots this as an volume element in maple if possible. This means, that every surface has a grid. Can anyone help me with this one? I only seems to be able to plot planes i maple? //Sentinox

## How to dislay few phaseportraits...

If I have two different plots constructed with plot command I can display them simultaneously: > F:=plot(...); G:=plot(...); display(F,G); However, if I try > with(DEtools): F:=phaseportrait(...); G:=phaseportrait(...); display(F,G); Maple 10 returns an error that display requires plot! Is there a way to display simultaneously two phaseportraits? Thank you in advance Victor Ivrii

## Very long runtime for that integral - why?...

The following seems to run endless (WinME, M10.02 classical interface): Int(2.9992571251988*(kappa-.89988751406074)/Pi* exp(3.3571035419740-12.0624756920228897*ln(kappa))* BesselK(1,26.1571648648044217*(.13147587176957e-1+(-.57683186342273e-1+ln(kappa))^2)^(1/2))/ (.13147587176957e-1+(-.57683186342273e-1+ln(kappa))^2)^(1/2)/kappa, kappa = .89988751406074 .. 4.0); evalf(%); I did not want to massage it by hand (as the fct may change and actually I want the upperbound to be infinity). The reason can not be the slow numerics for Bessels (as an external DLL with brute callback gives the result slowly,

## shooting down Maple through long expressions?...

That kills my Maple ( M10.02 on WinME)

restart; _EnvExplicit:= true;
Eq:=0 = 'mu + delta*sqrt(alpha^2-Theta^2) - sqrt(alpha^2-(Theta+1)^2) ';
[solve(Eq, Theta)]:
sols:=%;

giving the system message:

CWMAPLE verursachte einen Fehler durch eine ungültige Seite
in Modul CWMAPLE.EXE bei 017f:00459d0b.
Register: blablabla

If I prevent output by "sols:=%:" (using a double point) it is ok and one
sees that it would produce ~ 5000 pages ( = length(sols)/80/60 ).

Could be that one reason?