Hi,

I have a trigonometric series which contains 1D and 2D modes. It looks something like the following:

S:= Acos(mx)sin(nz) + Bcos(kz)sin(qx) + Csin(sz) for m,n,k,q,s=1,.....10.

I am iterested in obtaining the amplitudes of the 1D modes (i.e. C in the above expression). Is there a way to do this using the coeffs function? I would like to use this in such a way as to isolate the 1D modes from th series. Any suggestions?

Thanks for your help.

Hi, 

   I'm solving two equations and two unknowns with fsolve where there are multiple solutions (at most 3). I iterate this and my next set of solutions depends on the previous one. The problem is the the first solution (the only one I need) may be arbitrarity close to to the previoius solutions and fsolve skips it and finds the second solution. Any recommendations or ways of makign fsolve resolve arbitrarily close solutions?

Thanks,

Hi guys,

I have the following complex equation,

Az:=unapply((rhs(sol[2])*BesselJ(q,t2*r)+rhs(sol[3])*BesselY(q,t2*r))),r)

It gives a value which is constant for frequency upto 3000 Hz, i.e. if I run the solution again keeping all the values constant the result is the same  BUT   When I change the frequency to 15000 Hz, the equation still give me the result but every time its different when I run the program with constant values.

Hi,

I am aplying a simple energie balance with some simplification, and i am implementing it on maplesim.

The component has the following equations:

Am i missing something? Do i need any aditional equation to maplesim know to where should the fluid be moving when Qjacto is positive or negative? Why do i have...

If I have  the following..or different numbers, but 2 different arrays I need to calculate sample mean & variance

Array A:=([1,1,1,0,0,3,2,4])

and

Array B:=([2,1,0,1,3,3,4,1])

what formula do I use to force Maple 16 to calculate the sample mean and the sample variance?

Hi,

I am trying to perform a simple model of the entrainment of air in a jet by aplying energy emand momentum balances to the injector and flute. But i am having doubts on how to prescribe pressure on a point. This is the equations of the component Injector:

In the component porti...

Hi

I want to plot a graph of Sin[x*Pi]*Exp[A*x], this works perfectly well for low A values but I want to try say A=10^2. Is there any way to plot this sort of function?  

I need to use subscripts to define a system of equation and its respective variables. I do not encounter any problem when I use solve or Basis (with Groebner package) but when I tried to use RealRootCounting (with RegularChains and SemiAlgebraicSetTools packages), I got the following error message:

Error, (in RegularChains:-SemiAlgebraicSetTools:-RealRootCounting) invalid input: TRDnearsolve expects its 5th argument, vlist, to be of type list(symbol), but received [p[1], x[1], q[1], u[1]]...

Hi

Is it possible to plot WKB solutions such as exp(-I*f(x)*x)/sqrt(f(x); where f(x) is any generic function of x e.g. sin^2x ? I have been trying in maple but can't get it to give me a plot.

Hi,

I have two separate procedures, one which solves a series of ODE's using the midpoint runge-kutta method, and one which solves using the Taylor expansion.

I am able to graph the two results (Q1 vs time) on separate graphs within the procedure, however after "end proc" I can't retrieve the figure or plot the two seperate results on the same graph to compare the values.

Is there an easy way of doing this or do I have to rewrite the procedure to include both methods?

Let us consider the list L:=[$1..10^23]. Which number is greater: the number of the members of L having the sum of its digits in  RealRange(10,99) or the one in RealRange(100,999)? How to find it in Maple?

I want to solve 4 nonlinear equation using maple. I want to find many roots of this 4 nonlinear equation.

I have no idea about initial condition so I use 4 for initial condition. my program is as follow:

f1:=nonlinear equation1(include variable q1,q2,p1,p2);

f2:=nonlinear equation2(include variable q1,q2,p1,p2);

f3:=nonlinear equation3(include variable q1,q2,p1,p2);

f4:=nonlinear equation4(include variable q1,q2,p1,p2);

I know that I have made a simple error, but I do not know why the negative intercept is not plotted in the sample code.

Thnks for any help.

Martin sample3.mw

MAPLE Users,

Suppose I have a set of points in some N-dimensional space.  I would like to obtain a simple polynomial that

best fits the data.  I do not know in advance the form of the function, but a simple function that does not overfit

the data would probably be OK.  By "simple" I mean the smallest degree with or without cross-terms that gives a

decent fit.  My data set will typically be an external comma or tab separated text file.

Hello,

I am brand new, just joined in order to thank a member (gmm) for a publicly searchable MaplePrimes post I discovered in researching the origin of french curves. I linked to gmm's post in a blog post I wrote about the application of conic sections in the drafting of sewing patterns. I tried to send gmm an email...