The numerical solution of PDE with IBC is given as a module: Download PDE1.mw . How to extract u(0.5,t) and u'_t(0.5,t) from this solution? Thanks in advance.

Following the last question: After eliminating the units, the equation is still not solved. Such kind of equation is not solvable at all, even numerically? Thanks.

PS: Is it possible to edit a posted question? Sometime I want to add more information but could not edit the old one.

Hi, again, I am a physist. It is convenient to solve problems in presence of units. I have a equation (1-variable) including a erf function to solve. As I substute all the constants (with units) and then use 'solve'. It returns a warning without any result. I am not really familiar with the numeric package in maple. Could anyone give me some advice? Thank you.

Hi, I am a green hand of Maple. I guess this is a common question for many users. Some times, Maple can not deal with an integral with a lot of symbols. However, if I manually simplify the integral somehow so that less simbols are left, keeping the main feature of the integral unchanged, it works. Thus, my question is: Is there some limitation that number of simbol can appear in the integral? What decides whether a integral works or not? Thank you.

Just wondering how many undocumented commands exist in Maple?  HTTP is only one I know about.  I believe documentation for it exists only in a help page on an older version of Maple, Maple 9 I think (but removed in newer versions), however it's functionality is still active in the newer versions. 

Any others?

Hello

I want to solve a cylindrical PDE with Maple. how can i solve it?

I couldn't set plot view ranges for plot component (in the attached worksheet). How can i do that?

example worksheet has to draw an ellipse whose center coordinates are determined by two sliders (lef tslider for x, right slider for y). I used following callback function

Do ( xpos = %xPos );
Do ( ypos = %yPos );

Do( %Plot0 = plots[display]( plottools[ellipse]([xpos,ypos],3,4)), view=[-10..110,-10..110],axes=boxed );

When i try setting this task at prompt, it succeeds ...

The other day when I had a chance to have a look at Maple 14, I noticed the font looked much nicer.  So I had a look at previous versions and found out that the same font in Maple 14 compared to 13 is different?  Why is that? 

Both fonts were done at default (graphic user interface) - 12pt. Times New Roman and C text (just text mode)  In Maple 13 the font looks stick like, and in Maple 14 it looks more textbook like.  If they are different...

Mathematica has a way of clipping plot output to a region given by a function. See http://reference.wolfram.com/mathematica/ref/RegionFunction.html

Can I do something like that in Maple?

Is there a way to import Latex into Maple? Actually, my immediate goal is to convert mathtype expressions into Maple.  I can convert Mathtype into latex. If I could convert latex into Maple, I would be done.

Incidentally, exporting Maple into mathtype is easy.

I have Maple 12.

I am working with coupled diff. equations to find equilibria (set equations to zero and solve simultanously). Currently I am working with two equations for predator prey systems. I have typed them like this:

> EqP := r*P(1-P/K)-h*P*M = 0;
                              /    P\   ...

Hi, Can anyone help me in solving the following system of ode, i'm new in maple and i faced some problems in using it.

the system:

diff(u2(y), y, y)+m*b*rho*h^2*GR*(c3*y+c4) = 0,

diff(u1(y), y, y)+K*(diff(N(y), y))/(1+K)+GR*(c1*y+c2)/(1+K) = 0,

-2*K*(2*N(y)+diff(u1(y), y))/(2+K)+diff(N(y), y, y) = 0

with the following boundary conditions

u1(-1) = 0, u2(1) = 0, u1(0) = u2(0), (D(u1))(0)+K*N(0)/(1+K) = (D(u2))(0)/(m*h*(1+K)), (D(N))(0) = 0, N(-1) = 0

Recently I wanted to create a simple 2D-plot representing this piecewise expression:

T1:=piecewise(x>=0, 3.5*x*13/3+13, x>=20, 3.4*x*13/3+13, x>=30, 3.25*x*13/3+13);

or alternatively: T1:=t->piecewise(t>=0, 3.5*t*13/3+13, t>=20, 3.4*t*13/3+13, t>=30, 3.25*t*13/3+13);

Unfortunately, no matter whether I entered it as a function or as an expression, I was not able to make Maple plotting this function correctly for a domain D

Hi,

Please take a look on this problem I have about converting a Vector to a List. At the end if the program, the list F contains the elements of the Vector Y, but not in the good order.
It gives a result which is correct for a small size of Vector, but not for h = 1000 !

#differents values of h are tried h := 100 and h:=1000
h:=1000;

E := Vector[1..h];
for u from 1 to h do
Y[u] := u;
end do;
for z from 1 to h do
   E[z...

Is it possible to make a plot like this: