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?

Check out most of the active conversations.

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

Hi,
I want to call Maplets from Flash, 

1.I have been using TA for some years but we have only recently moved from version 4 to version 6. In versions up to version 5, when a question was edited there was a two stage saving process ie. the question was saved and the question bank was saved. Only after these two saves did assignements containing the question reflect the edits in the question. I have an assignment which depends on a question in TA6 and I have edited saved the question. The assignment does not reflect...

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!

polar_circle.mw

It is a problem which exists in my mind for a long time. Can any one give me some advices? Thank you!

Best regards!

Hi guys,

I've a simple question, can I run a maple mpl file with options? I mean, instad of

maple file.mpl &

doing

maple file.mpl --option1 value 1 --option2 value2 etc &

If yes, how do I instruct the code about what to do with those options, eg assign them to variable?

Thanks

salvatore

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