Hi all,

i produse an out put file by fortran, i want to draw it 3d. but i just able to plot it as the matrix that it is not usefull for me,like these:

Checking the box for self registration on the system administration page and clicking submit returns a page that has the box checked but logging out and logging in again show that the option is not set, the box is not checked.

Furthermore I am unable to locate this setting in the system.properties file or in the system_properties table in the database.

How do I enable self registration?

Hello,

I have some trouble with specifying an optimization problem in NLPSolve (package Optimization).

This is the situation: the Maple help specifies 3 ways of calling NLPSolve. Algebraic, Operator and Matrix form.

I can't use the algebraic form for this problem.

I tried using the Matrix form but the problem is that I have a few linear constraints which can't be represented using a matrix (A) and a vector (b) (the linear constraint typically is Ax = b)

I need to solve this equation:

 

2*(diff(R, t))*sin(theta)*sin(phi)*(diff(phi, t))+2*(diff(R, t))*cos(theta)*cos(phi)*(diff(theta, t))-2*R*sin(phi)*cos(theta)*(diff(theta, t))*(diff(phi, t))+diff((diff(R, t))*cos(phi)*sin(theta), t)-R*sin(theta)*sin(phi)*(diff(diff(phi, t), t))+R*cos(phi)*cos(theta)*(diff(diff(theta, t), t))-R*cos(phi)*sin(theta)*((diff(theta, t))^2+(diff(phi, t))^2)+R*sin(theta)*cos(phi)*e^(-R^2) = 0

 

 

how would I do this?

It seems the exponential function needs all arguments in order to be evaluated: a := .2*exp(A[1, 1]+A[1, 2]); A[1, 1] := 2; evalf(a); 0.2 exp(2. + A[1, 2]) However, I would like to be able to see Maple evaluate as much as it can, ie, the above command should give: 1.4778*exp(A[1,2]) Where 0.2 was multiplied by exp(2), and the rest of the exponential was left symbolic. Is there a way to force maple to do this without having to manually factor anything ? Thanks

How I do this? I've plotted three separate inequalities using the "inequal" command. But now I want these inequalities to be represented on the same graph. For instance, I want to plot say: inequality1 OR inequality 2 OR inequality 3 and see how the three regions/inequalities relate. Any help very much appreciated.

Hello,

I`m a new Maple-user and I have some troubles with finding real zeros of a complex function/equation. Suppose that I have let me say CylinderD(n,a)*CylinderD(n,I*a)+exp(I*n*Pi/2)=0 , where a =2.0 and I=sqrt(-1)  and I want to find out the real zeros for this equation. I can count the zeros by using Rouche theorem and argument principle but I need more. Also, I tried to find the roots of a function CylinderD(n,I*a) by using maple and I couldn`t obtain it. Do you have an idea ? Thank you for your help.

Does any one know how to find the ratio?

Greetings,

I am triying to plot the solution of the next differential equation:

-diff(x*(diff(u(x), x)), x)+u(x) = 0

With the ics:

u(0) = 1

x*D(u)(x)=0 when x=1.

How can I do that?

I tried to get the solution using numeric methods, but I have the message:

Error, (in dsolve/numeric/bvp) system is singular at left endpoint, use midpoint method instead
 

 I tried to use midpoint method and I still get an error message.

Is the student software good, and easy to use?

 

Hello,

When doing a numerical solution to ODE using dsolve, I specify a ranges where I want the solution. Often time, I know that the solution only exist somewhere inside that range, for example, I often looking for valid solution where f(x) >= 0, and the numerical integration would fail beyond certain x. But I don't know what x is, so I just specify a range (by guessing) that contains x.

Maple / dsolve then would give an error like:

Is it possible to have a Plot Component in a Maplet?

I would like to include a plot in a Maplet that can be changed using some continuous action, like what you can do with a Plot Component in a worksheet by dragging the curser over the plot region.

In a similar way: Is it possible to have a slider with a continuous action in a Maplet, like the Slider Component in a Worksheet?

Help need to to solve BVP problem in Maple

BCs

> X = 0; Pb = 0; A =0 .441;
> X = 1; Pb = 0;
 

Q can be changed to acheieve the other end BCS

System of ODEs

ODE 1 : function of X & A      -----    ODE 2 : function of X,A&Pb

Hi

does anyone know where I can find a procedure for an exact calculation of the Mann Whitney test (uses a recursive formula so non-trivial).

thanks!

Hi, there

 I have a formula as blow:

Ue = .5*A*E^2+B*E^beta/(Emax-E)^alpha

I need to find the cofficients (A,B,alpha ,beta) in above formula.What I know is that the relationship between Ue and E, which is:

E Ue 0 0 0.2 0.01576213 0.4 0.629139894 0.5 1.457776151 0.6 2.958910418 0.7 5.605599058 0.8 10.20002179 0.9 17.77607359 0.92 19.57451259 0.95 22.81827108 1 29.34874031 1.02 32.35324584 1.04 35.41703504 1.06 39.08008982 1.08 42.71086444 1.1 46.46475176 1.12 50.53683716 1.14 55.48548924 1.16 60.4973377 1.178 64.70966192