Maple 15 will soon be released (looks like sometime in April based on the last two relese dates).  It also looks like Maplesoft, recently, has settled into a happy release date schedule of April and October where we can most likely expect a major release or update to be available. 

It seems ironic that the even releases of Maple seem to be the most successful.  Maple 10 was more so than Maple 11 but probably due to it's long 2 year stay before...

Dear all,

I've got a Vector,

>V:=<xt[1, 1]*xt[1, 2]*alpha>;

and what I want to get is the elements in V which has xt[2,2]. In this case, <NULL> is what I am looking for.

I tried the following line:
> select(has,V,xt[2,2]);
     The result is Vector(1, {(1) = NULL});
when I tried
> select(has,V[1],xt[2,2]);
     The result is 1.
I have no idea where this

When I use pdsolve to solve a system of PDEs, and tell it to use HINT='*', does the solution I get ONLY contain those obtainable by separation of variables, or does it use separation of variables as a starting point and deliver the general solution? And how can I tell?

Hello,

I make an simple animation as the figure illustrated, which the key codes were learned from Mr. Robert Israel a few days ago in one thread. Now I want to let the rectangle motionless when the circle rotating in the rectangle for a special use. Is there any way to achieve it? 

Good Night.

I have problem when i am using ODE, because i have an error : (in plots/odeplot) curve is not fully specified in terms of the ODE solution, found additional unknowns {x3(t)}

I do not know how I can 

Hello everyone,

I need to create a 3d plot, but color the surface depending on the function's sign, say red for positive values, green for negative. How can I do that?

Thank you,

Ozgur

Hello

I would like to have an optional input value in my procedure. It could be of type string or numeric value.

Example:

bgp:=proc( x, y, z, optional) local bgp, A;

bgp:=Array(1..2);

bgp₁ :=pointplot3d([x, y, z]);

# if the optional value exists:

bgp₂ :=textplot3d([x, y, z, optional]);

A:=bgp₁;

# and if the optional value exists:

Hello to all,

I have some data and i want to create a 3d columngraph from them but i can't  find a relative command in Maple.. I want something like the "AreaChart" command without the lines connecting the points..One solution is the Pointplot 3d, but if there is a way to do it with columns is much more preferable..!

Thanx!

Hi,

How to output the solution given by pdsolve as a *.csv or a tab delimited text file?

Maple has got to really work on its help documentation.

Thank you,

Regards

with plots

Eq[1] := 5*(diff(f(eta), `$`(eta, 3)))+(m+3)*f(eta)*(diff(f(eta), `$`(eta, 2)))-(2*m+1)*(diff(f(eta), eta))^2-(2*(2*m+1))*h(eta)-(m-2)*eta*(diff(h(eta), eta))

Eq[2] := g(eta)-(diff(h(eta), eta))

Eq[3] := 5*(diff(g(eta), `$`(eta, 2)))/Pr+(m+3)*f(eta)*(diff(g(eta), eta))-5*m*g(eta)*(diff(f(eta), eta))

BCs := [f(0), (D(f))(0), (D(f))(18), g(0)-1, g(18), h(18)]

pars := {Pr = .1, m = 0}

for i to 3 do eq[i] := subs(pars, Eq[i]) end do

I myself have written some programs of math in Maple (e.g. ABC.lib, ABC.ind, ABC.mw).
Who could help me how to upload these programs for everyone using easily without downloading and setup them? Thank you so much!

Dear all,

I wrote some simple functions in Maple 13, called "myproc" file,

and used startup code (edit-->startup code) to initialize it in a worksheet by: read "myproc";

Now I am using Maple 14, it does not work, says, "unable to read", sort of thing.

I have also tried to rename the file to myproc.m and read "myproc.m";

does not work either.

Is there any compatibility problem?

Thanks.

casper