Hi there,

does anyone know how to write standard multicolumn numerical data sets generated by a "for" loop into an array of data files with names "dataset%.txt", where % is iteratively given by the value of the loop index? Thanks a lot. 

hi,

how do i solve the following?

 

restart:

ode:=diff(y(t),t$2)+y(t)=piecewise(t in [0,Pi],t, t>Pi,Pi);

ics := y(0)=0, D(y)(0)=0;

 

dsolve({ode,ics});

Thanks

 

Hi everybody,

I'm not really sure of where sould I post my question.

Let me explain my problem :

I've got a convolution product of my function f and my filter called G (let say a gaussian for example, or a top hat filter). It is as follows :

filtre:=proc(g);
return x->(1/(2*Delta)*int(g(t),t=(x-Delta)..(x+Delta)));
end;

filtre:=proc(g) local a,G;
G:=x->sqrt(gamma/(Pi*Delta^2))*exp(-gamma*x^2/(Delta^2));
return x->int(g(t)*G(x-t),t=-infinity..infinity);
end;

Hi, i have a dgl i want to transform:

y''-7y'+10y = (sin(2x))/x

The laplace command works, but how can i insert initial conditions ? The help page says:

 

How can Maple arrive at the following, for an unspecified function f(x,y), without knowing sufficient conditions (eg. whether the 2nd partials are continuous)?

> # From the ?diff help-page
> diff(f(x,y),x,y) - diff(f(x,y),y,x);
                                      0

Continuity of integrands isn't generally assumed by int (there's a separate optional parameter which enables it...

Hello :) I would like to print my Maple Documents or Worksheets, or export them as a PDF. For sure i allready found the functions for that in the Drop Down Menue on top, but: The prints, as well as the PDFs convert the Font, and lots of things get converted somehow. For example a "Minus" Sign in an "l". I uploaded an example Screenshot here: http://gallery.mac.com/gernot.heissel#100024/BspFoto-20Maple-20Print&bgcolor=black First row is Screenshot of the expression in Maple 2nd row is what a convertion into PDF of this expression looks like.

hi,

i have to do a exercie to draw a sphere with maple. (radius = 5 )

first problem is to get the function for the sphere(implicit and explicit)

for the implicit one google helped me and gave me:
f(x, y, z)=x²+y²+z²-r²=0

i plotted it succesful with
plots:-implicitplot3d(f(x,y,z)=0, x=-5..5, y=-5..5, z=-5..5, scaling=constrained, axes=boxed);

for the explicit function i tried to solve the function for the x variable:

exp_x :=(y,z)->sqrt(r^2 - y^2 - z^2); 

Hi,

 

First, is there a simple way to write the double derivative of a function say x(t) so I will receive as output x(t) with the double quote on the top instead on writing it in a long form diff(x(t),t,t)

Secondly, I have a problem with a system of pulleys.  See if you can find where I am missing something.  Here the file:

 

For the last hour I have been starring at this problem.  Each time that I think I understand what is being asked my mind confuses itself.

Here is the problem.

http://img262.imageshack.us/img262/8387/helpxz2.png

 

Me or Maple?

Okay here's the problem.  A function is described as Y:={a*t^2*[exp^(-b*t)]*cos(c*t)}/(1+d*sqrt(t));

I differentiate Y wrt t to find the velocity of the funtion V:= diff(Y,t);  also acceleration A:=diff(Y,t,t);

I give some values to a,b,c,d and assign a T:=20  and so a:=2: b:=3/8: c:=10: d:=1

Now I plot to view the velocity of the function over the time t=0..T    plot(V,t=0..T);  GREAT!

hello..

everybody who read this message, please help me..

i really need your help..

i am given an assignment about heat equation and i need to solve it by using Maple.

i know nothing about Maple even never use it before.

this is the question:

Consider the heat equation u_t(x,t)=0.2u_xx(x,t) with the following boundary and initial condition:

u(0,t)=u(1,t)=0, t beetween 0 and 0.1

u(x,0)=100sin(pi*x), 0<x<1 take h=0.1 and k=0.01

Hello,
I want to remove properties (assume) programmaticaly.
in all the following code, e is indets(f); where f can be any function, list etc.

none of the followings works :
unassign(e[])
map(x->unassign(x),e);
assign(map(x->x=uneval(x),e));
etc.

the following seems to work, at first
assign(map(x->x=uneval(uneval(x)),e));

but finally no:
assume(a,'constant');
e := indets(a*x+b);
assign(map(x->x=uneval(uneval(x)),e));

This is a word file conatian a full discription for a partial differential equations please help me to solve it  

 www.4shared.com/file/44705973/d2bd94e4/New_Microsoft_Word_Document__3_1.htmlplease

 

please help me

Hi all,

I am looking for toolboxes that can handle simulation and solution of
SED with jumps, say levy processes, jump diffusion processes, etc.
Could anybody give me some pointers to really good ones in Maple and
Matlab? I did google search myself and have some findings... however I
would like to know some really good ones and popular ones so I can
discuss with fellow users more conveniently...

Thanks!