## How do I get my procedure to work?...

What does "Warning, `delta_Ia_con_p` is implicitly declared local to procedure `inductor_current_RMS_AVG_p`" exactly mean?

I get this, when I execute the following procedure:

# art=0 returns RMS current and art=1 returns AVG current
> inductor_current_RMS_AVG_p:=proc(Ue,Ua,Ia,L,T,art)
>
> delta_Ia_con_p:=(Ue-Ua)/L*Ua/Ue*T;
> inititial_inductor_current_con_p:=Ia-delta_Ia_con_p/2;
> initial_inductor_current_p:=piecewise(Ia<eval(IaLG_boundary_condition), 0, inititial_inductor_current_con_p);
> # initial_inductor_current_input:=initial_inductor_current;
> inductor_current_increase_p:=initial_inductor_current_p+(Ue-Ua)/L*t;

## problem with dsolve...

i put system of eqn to dsolve (3) sol := dsolve([sysode, icsode]); and i am getting sol:= is it means that maple can't solve it?

## diff df/dq(t)...

i have a function f(q(t),...)= q(t)*sin(q(t)). i need to do df/dq(t). how? thank's

## counting elements...

how do i count the numbers of elements inside of a list like [[x,y,z]]? ie. [[3,2,5],[2,34,6]]. i would want it to return 2.

## Plot3d and color....

Why do I get the same output with the two following statements plot3d(0, 0..20, 0..70, color=proc(x,y) 200000*x end proc); plot3d(0, 0..20, 0..70, color=proc(x,y) x end proc); How does the option "color=proc() ..end;" works? How can I choose the colors? (The reason behind my question is that I am trying understand how to plot the Mandelbrot set)

## Sorting a list with constraints...

i have a list in the form of [[x,y,z]] where x,y,z are integers, i want to find all the elements of the form [0,y,z]. how do i do that?

## Maple 10 opens to gray screen Java problem?...

This is a screenshot of what I get when I open Maple 10 http://img226.imageshack.us/img226/5010/maple100fe.jpg (copy and paste url) The Maple Calculator also results in the same problem What Java programs are required for Maple 10? I have the Microsoft Virtual Machine installed as well as Microsoft SDK 4.0. I am running XP with SP2. Any help is greatly appreciated.

## Help checking equivalency of a statement...

Why am I getting a false statement as output for this input ? > >

## i need to do symbolic Differentiation...

hi i am mechanical eng. student. i am new user of maple and i am useing maple 8. i need to do symbolic diff, diff of theta is theta dot. theta is function of t but i don't know it. i am building a def. eqn. with Lagrange equations. how i do it with maple?

## ... save a module containing "define_external" as ...

I have a module with an exported procedure defined by `define_external`, like this:
``` loadtest := module() export hb; option package; hb:=define_external( `hb`, `MAPLE`, `LIB`="/home/hans/system/maple/libhb.so"); end module: ```
This works if I put the code above into a .mpl file, and use `read` to load it. The problem is that I would like to save this module to a maple library:
``` > libname; "/home/hans/system/maple", "/usr/local/maple8/lib" > savelibname:="/home/hans/system/maple/loadtest.lib": > march('create',savelibname,100); > savelib('loadtest'); > map( march, [ 'gc', 'reindex', 'pack' ], savelibname ): ```
When I try to use this newly created library after restarting maple the following happens:
``` > A:=Matrix([[3,2,1,-2,-1,-4],[1,0,1,0,-1,0]]): > with(loadtest); [hb] > hb(A); [3 2 1 -2 -1 -4] CALL_EXTERNAL([ ]) [1 0 1 0 -1 0] ```

## ...generate correlated random numbers...

Hi everybody, in Maple 9.5 I need to generate two Vectors of random generated numbers from a normal distribution with a certain correlation. The correlation should be an input factor. Does anyone know how to do that?

## I've got problems. Maple won't start. 9.5 or 10, b...

Hello everyone, my first post here. I'm studying mechatronic engineering at university so Maple is somewhat of a godsend. I got Maple 9.5 some years ago and it worked perfectly. But sometime last year it started going wrong. Whenever I tried to start standard maple it would give me some cryptic errors and refused to start. I had to resort to using Maple classic worksheet and it works just fine. Try as I might I could not discern the cause of my problems. I tried disabling my firewall and a number of other suggested fixes, none of which helped. Recently I was given Maple 10.0 and I thought installing it might fix my problems. I wasn't so lucky. I get essentially the exact same error when attempting to start Maple 10.0: