I am creating a randomised dataset in a workbook, I want the students to use this data but I also want to save the matrix within the same workbook as a csv file so that when I come to look at their work I will see the exact dataset they were supplied with. Can anyone advise on how I might do this:

The code is:

x := convert([seq(1..100)], Vector[column]):

y := 0.1*~x:

with(SignalProcessing):

tmp := GenerateGaussian(100, 2, .6):

tmp2 := convert(tmp*~y, Vector[column]):

ad1 := <<x>|<tmp2>>:

I tried - Export("this:///DataFiles/exdat.csv",ad1):

but get the Error message - Error, (in FileTools:-OpenURI) entry with path '/DataFiles/exdat.csv' is not found

Is what I'm trying to achieve even possible?

Thanks in advance

Jo (p.s. pretty new to Maple)

Please tell me how to calculate the derivative of a matrix function?

how to find the maximum value of the column of the table?  for making the table i have used table command.

in this problem i used slip coundary condition.

the plot want to starts in 0.2, but the plot starts in 0

bc := f(0) = 0, (D(f))(0) = ak*((D^2)(f))(0), (D(f))(N) = 1, g(0) = -de*((D^2)(f))(0), g(N) = 0, T(0) = 1+be*(D(T))(0), T(N) = 0:

How to type double drivative in BC.

In my diagram the horizontal axis cross the vertical axis at -1. How do  I combine location = origin to have to run through y=0?

Many thanks

How to sort the following equation

exp(B)+1)*B^5) = 1

into the following expression

Swanson_and_Turkel_To_Fortran.mwHello,

From the attached code, you can see that I have a Matrix, A, that I am trying to output into Fortran code so that I can simply copy and paste this long matrix into fortran. The output does not look correct. Doesa anyone have an idea on how to put this matrix A into a form that can be easily copy and pasted into Fortran? You can see that I tried to do each line individually in the attatched code but I am really looking for a way to do the entire Matrix. Thanks for any help or suggestions.

I need to build this model:
We consider a population of female salmon, they live 4 years. Survival for first three years respectively: 0.5%,7%,15%. Each salmon has female kids only in 4 year and produces 5000 female offspring

I am trying to solve 4x4 determinants, but there is many determinants in my problem, I want to solve it in maple. Maple gives the answer but its expression is large. how to confine large expression in a nice simple form in maple? Here is an example:

with(LinearAlgebra):

A:=Matrix([[phi,conjugate(psi),chi,conjugate(rho)],[psi,-conjugate(phi),rho,-conjugate(chi)],[lambda1*phi,conjugate(lambda1)*conjugate(psi),lambda2*chi,conjugate(lambda2)*conjugate(rho)],[lambda1*psi,-conjugate(lambda1)*conjugate(phi),lambda2*rho,-conjugate(lambda2)*conjugate(chi)]]);

rk2.mw

Hello everyone,

I have an ODE for which I want to show that any initial condition leads to a convergence towards a point. So far I made a sequence of dsolve procedure, each with a distinct random initial condition, and I can plot everything on the same plot without a problem with display.

The parameter of the ode is the time t, so that the system of ode is some d/dt x(t) = f(x(t),y(t),z(t)), etc. To show time passing, I have two solutions in a sense, either by color, or by an animation. But the latter is not very convenient as I am already planning of to animate the rotation of the camera since the plot is 3D. What I would like, is the color of the curve to be say blue at time 0 then go to green as t goes to 5, for example.

I know something should be possible as there is somehow an example given in plot3d documentation,
plot3d(x*exp(−x^2−y^2),x=−2..2,y=−2..2,color=x)
but I can't seem to make it work, no matter where I put my "color = t" option. Would one have an idea on how to achieve that?

Thank you for your time,
Cryme

I am attempting to have maple recognize the difference in singularities between:

f(x)=x+1  and

g(x)=(x+1)*(x-2)/(x-2)

In other words how can I stop maple from simplifying g(x) and observe the singularity.

Thanks in advance.

Mark

I'm trying to solve an ODE system from an IVP problem, but the error occurs: "Error, (in ...) cannot evaluate the solution further left of ..., maxfun limit exceeded (see ?dsolve,maxfun for details)"

I've already tried modifying the maxfun value but this did not work. I would like some suggestion.

Thank you

ODE_System.mw

Hi,

If any one can tell me how to solve the nonlinear system sys:={x^2+y^2+z^2=4,x^2+y^2-z^2=4,x+y+z=0} by using fsolve command? I tried fsolve(sys,{x,y,z});, but there is no value returned. May I give fsolve an initial approxiamtaion of the solution ? If that is the case, what should I do?

Thanks in advance!

Hi all,

can anyone  indicate me how display  1O^-5 and not 1/100000 on the vertical axis?

Thanks in advance