MaplePrimes Questions


I meet a problem. When I use command "if" in command "for", there is nothing.I don't know reason. Can anyone tell me the reason?

I am trying to use Maple to study a 1D wave equation with non-uniform coefficients. In general the problem does not have analytical solutions, hence I am using pdsolve(..., numeric). As the first test I am looking at the development of a Gaussian pulse in a uniform medium, doing:

PDE := diff(u(x, t), t, t) = diff(u(x, t), x, x);

IBC := {u(-10, t) = exp(-(-10)^2), u(10, t) = exp(-10^2), u(x, 0) = exp(-x^2), (D[2](u))(x, 0) = 0};

pds := pdsolve(PDE, IBC,...

I have a huge .txt file in it is a lot of difirent numbers. At first I am doing this:

>data:=readdata(C:/text.txt, 1, integer)

Maple reads the file.
I  have a function p(x)=e^(x^4+0.5*a*x^2+b*x)
I tried to draw a histogram and then to do something with fitting, I know that then I have to do logarithm the function then I get ln(p(x))=x^4+0.5*a*x^2+b*x, the histogram then should be up side down. The point is that...

Hi i'm new to maple.

Is there a way to remove commas from a list?

I was able to remove the list from its brackets []
but i was wondering if I'm able to remove the commas also?

Is possible to plot two or more functions at the same time in the iPad's application?


My question is fairly straight-forward, I hope someone has an equally straight-forward solution. I would like to be able to illustrate the convergence of the distribution on the mean of i.i.d random variables to the normal distribution. For example, I'd like to visualize (by way of a histogram plot) that as n increases arbitrarily, the mean of n i.i.d. exponential random variables with mean 10 converges to a normal distribution.



I am considering bu;ying an imac and want to run maple 15. I have a personal library, called Mylib. I use on my windows platform. I use an ini file that maple 15 reads when it first opens. In this file I modify libname with the statement,

> libname:=libname,"c:\Mylib";

My question is how do I do this on the mac version of maple?

I'm looking for a simple way, e.g. a function, to convert a system of symbolic equations in its matrix form.


(a+1)x - by + cz = j

2x  + (sqrt(d)+e)y - fz = k

(g-h2+1)x - iy - 4z = l

shall be transferred to matrix / vector form

A . x = b

where A i the matrix of the coefficients, x i the vector of the variables (x,y,z), and b is the right-hand-side vector (j,k,l).

The number of equations...


I'm new at maple and I was wondering if someone could help me. I've got a function with 3 variables:


Can you plot this function? Or do I have to give one or two variables a value and plot the function 3 different times with just one variable?


I was trying to use the LeviCivita in the physics package to type the left side of the following equation and let maple compute the right side, where it considers the totally antisymmetric tensor identity which reduces to 4 Kronckers. Then the Kroneckers disappear and give rise to the right hand side. But I don't know how to tell maple to do this. There is also another Levi_Civita command in the tensor package.


I'm Trying to calculate the Determinant of a 3 x 3 Matrix with symbolic entries with maple 15. But the Determinat function gives a wrong result. From the C+A-1 expression it uses only the C and ignores the rest.

When I calculate it "manually" the result is correct.

Here is what I'm doing:


The Maple file is attached to this question.

When a try approximating this problem by five decimal places, it doesn't do it. How do you fix this?



Please, consider this example:

I wonder why the match function returns TRUE and expressions that depend on the main variable x. I hope that someone can give me an explanation.

Best, Henning

Hello everyone.

When exporting the model in the picture, I want the variables to be:

s_P2(t), theta_R2(t) and theta_R3(t), as in the help example.

However, I obtain:

theta_R1(t), theta_R2(t) and theta_R3(t)

How can I choose the variables that I want?


Thanks for make learning easier!

Is there any way for maple to compute the nth degree taylor polynomial?
I tried using taylor(f(x),x=0,n) but that gave me an error. So then I tried taylor(f(x),x=0,infinity) but that just ended up giving me a memory error. Any help?

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