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!

Suppose a random m*n matrix created with the palette in Maple 11. I want to replace each instance of the number 1 by the symbolic variable "a".  Does anyone have a simple way to do it?

Thanks

I have derived a transfer function for a filter and would like to sweep the frequency and evaluate the result at each point.  Then I would like to plot all of this data to obtain the filter's frequency response. Anyone know how to do this?  Do I use a subs command??? Any suggestions would be great!!

Kirk

Hello,

I have small script that uses syntax checker mint and latex command and latex to convert an expression in maple syntax to an image. But functional operators are causing me troubles.

Suppose I want to enter the equation  (x+1)*(x-1) and I forgot to use the star (*) for multiplication. The result (x+1)(x-1) is also correct because Maple thinks that I am using functional operator x. But I would like to evaluate this cas as wrong syntax. So I have to detect functional operators (somehow) but I don't want to detect operators such as +, -, * and so on.

Hi

I have this problem regarding how many employees (the variable x) is needed to get the lowest wage cost in a company. I have written the following model:

>restart:

>assume(x,integer)

>assume(x>=0)

>a:=16362-(40+x)*504:

>b:=IF(a<0,16362-(40+x)*420,(40+x)*84:

>c:=IF(b<0,16362,(40+x)*420)

>d:=IF(a>0,a*12.65*2.0)+IF(b>0,b*12.65*1.5)+c*12.65

hi,

tried to solve a least square problem with maple.

i've n=3 measured data

xi = 1, 4, 6

yi = 2, 4, 8

and have to create a optimised function of the type y=f(x) = px + q

i gave maple this input:

y := <2,4,8>;

x := <1,4,6>;

with(Student[LinearAlgebra]):

LeastSquares(x,y);

Can maple rsolve equations of the type y(t)=sum(b(t),1..y(t-1)) for y? Thanks.

Hi,

I'm trying to optimize parameters in a implicit function. I can create a plot of the function using implicitplot. But I now need to find the maximum and minimum in a given range. How to do this. 

I have been searching for quite sometime, but I cannot find an answer to this.  So at last, I'm posting.

I keep trying to solve this equation below, and this is the outcome I get.  And, I have no idea what the solution means.  I am largely confused by the percentage signs, periods, etc...

Thanks in advance!

-kD

Hi,

I have to filter a load of analysis data and have written the following

We have an area defined in polar coordinates by

r = 1..3 and theta = 0..3*Pi /4

, and we wish to plot it in maple. Such a simple thing should be possible, but it seems impossible with implicitplot and polarplot.

Unfortunately, this exact maple plot is required for an assignment tuesday, so we would like some help

Sorry because I can not good speak English. I want to draw a graph with maple 10.

I want to draw a polar contour. I have some datas in a txt file. I want to read data and plot graphic. My datas have 3 colums. first column is radius (r) ,second column is angle (theta) ,third column is my fuction z. z=f(r,theta).

I do readdata and my datas reading. But I not drawing a contour graphics.

How do I to solve this problem?