I am trying to graph a torus using maple.

z= 1 - (r - 5)

Could someone please help. I think I need to use implicitplot3d but need help setting it up.

I also want to set up an integral that will allow me to find the volume and surface area of the torus. Any help appreciated. I do not know maple that well at all by the way.

When I execute the code below, dsolve returns the trivial solution. If I were to apply the BCs by hand I'd conclude that there is a set of eigenvalues associated with the ODE. Is there a way to have Maple produce the eigenvalue equation automatically, or would you typically apply the BCs by hand to find it?

Y_diffEq:=diff(y(x),x$4)-beta^4*y(x)=0;
Y_BCs:=y(0)=0, (D@@2)(y)(0)=0, y(L)=0, (D@@2)(y)(L)=0;
dsolve({Y_diffEq,Y_BCs},y(x));

 

PS

Is there another way to specify the derivative BC?

 

Thank you
 

Has anyone used MapleSim to coordinate with Matlab/Simulink Model for the purpose of making their autocode the most effiecent?  I belive from  a webinar I watched something like this could can be an application of MapleSim.  I'm curious if anyone  has used it for that purpose?  If so, what were the challenges/benefits? Did you save in embedded memory needed (i.e. smaller autocoded files) or shorter proccesing time measured? 

Hi, im having trouble with selectremove. Im trying to select R(z)>=0 or if R(z)=0 then Im(z)>0, i tried this:

selectremove ( if z--> R(z)>=0 else R(z)=0 then Im(z)>0 end if , % );

 

but its not working, any help would be much appreciated.

 

Thanks. 

 

 

I've been working on my master's project and am at (at least I hope I've got it) the final stage of making Maple do everything that I want it to. I have the flow chart here which is a little hard to see while looking at the module I have set up.

The difficulty I'm having is getting it to run as a whole. I just do not know what I need to do to get the thing started. The way I have it set up is that each procedure references another until they are done - a loop structure. Which may be more appropriate but I humbly submit it to you.

I do not completely understand the module pieces. I do know that each procedure I have inside of here should work (and if not, that's why it's a master's problem :D)

Thank you again for looking!

 (I know the local and export may not be correct, and sorry for the matrix multiplication looking so ugly here)

I want to evaluate a polynomial and turn its coefficients into hfloats. Shouldn't evalhf do this? For example:

f := randpoly([x,y,z]);  # integer coefficients
g := evalf(f);    # software float coefficients
h := evalhf(f);   # error

I think the last one should give me a polynomial with hardware floating point coefficients. Instead I get an error.

Hey there . i am new to this software.. so please help me to plot this: i have two equations: x1+x2=m -3*x1 + 4*x1^3 - 3*x2 + 4*x2^3 = 0 i want to have m on the y-axis . Range for m is 0.4..1 i want to have the curves of both x1 and x2 on x- axis and on the same graph . Both x1 and x2 have a range of 0..1. thanks in advance ..

Hi

I'd like to see the solutions of this system of differential equation with boundary conditions :

 

restart;
with(PDEtools);
EDP := diff(s(z), z) = -.45*i(z)*s(z), diff(i(z), z) = .45*i(z)*s(z)-.2*i(z)-.8*(diff(i(z), z));
IBC := s(100) = 1, (D(i))(100) = 0

 

But, when i do : dsolve({EDP, IBC}, numeric, range = 0 .. 100);

Hi,

I'm using MAPLE 13 on Mac OS X 10.5.8 with a "French keyboard".

densityplot requires an expression or function as its argument. 

Is there any way to trick maple into using a list of points?

 

 

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I am trying to determine the mesh current method using a circuit that I have constructed using OrCad the similator has the correct voltages and currents but I am having difficulty with Maple getting the 2 matrixs to come out properly. The method is called the cramer method. I am using it in conjunction with a 2 voltage source circuit.... Matrix one is to be divided by Matrix 2

Matrix one is

40   -8   0

0     20   -6

-20   -6    10

__________

Matrix 2 is

Suppose I set

a:=plot(x^2) or some other complicated expression, but just for simplicity sake

Then I go ahead fill up a worksheet then change the a to b in the same line and alter the expression for variable b (because I didn't want to type out a new line for the variable)

How do I recall what I've set a equal to? 

eval(a,1) - just returns the plot and    print(a,1) - returns PLOT(...),1

I think there's a way but I can't recall.  Can someone point me in the right direction?

When rotating any 3dplot, for axes=boxed, how can I stop the tickmark axes from jumping around to different edges of the box?

 

Can someone give a an example what the choices in tools/options/precision/ Digit Elision or term elision are good for ? The help page is unclear to me:

http://www.maplesoft.com/support/help/Maple/view.aspx?path=worksheet/managing/OptionsDialogPrecision

 

Thanks