Hello everybody

I'm new in maple and i have a problem with the command 'collect':

i have a complicated expression with sinus and cosinus and many variables. the problem is that maple does not collect all the coefficients of a variable together.

how can I solve this problem?

I want also to collect the coefficients of each variable together in a function or a variable.

how can I do this? (I'm using Maple13)

Thanks

 

I am trying to fit  this function with some data
F:= M*(  (1 -  ( 1 - a)*e^(-k*q*t)) /q)^(1/(1-q)) ;
where a:= (No/M)^(1-q). I need to know the values
of k, q and M, I do have No (initial condition)
 

DATA:=
[[13.2621 ,  0.0012],
[14.0740 ,  0.0017],
[15.4272 ,  0.0031],
[16.7803 ,  0.0063],
[18.1335 ,  0.0174],
[19.2161 ,  0.0317],
[20.5692 ,  0.0598],
[21.6518 ,  0.0821],
[23.0049 ,  0.1501],

 

i have no idea where to start

 

 

 

g defined by

 

g(x) = x+4 / (2x+9)ln(x^2-15)

Find the equations of all vertical asymptotes (if any), of the function

Hi,

I wanted to use some non-orthogonal curve linear coordinates. I have entered them into maple by:

 

with(VectorCalculus):
assume(r>0,theta<=0,theta<Pi,0<=phi,phi<2*Pi);
AddCoordinates( 'myCoords1'[r,theta,phi], [(L+r*cos(theta)+Delta(r))*cos(phi),(L+r*cos(theta)+Delta(r))*sin(phi),r*sin(theta)] );
 

However this gives the warning:

Warning, the unit Vectors in the new coordinate system are not orthogonal, only added to global coordinate systems

 

Hi everybody is there a built-in procedure that transforms a complex number in its exponential form: a+I*b -> sqrt(a+b) exp(I*arctan(b/a)) Tks S.

Hey, i am a undergraduate at uni and i have run in to a bit of a roadblock with Maple.

I am using the following code;

M[Star]:=2*10^(30);

M[planet]:=2*10^(27);

q:=(M[planet])/(M[Star]);

Delta[p]:=max(H,|R-a|);

Alpha(R,a):=piecewise(R<a, -(q^(2)*6.67*10^(-11)*M[Star])/(2*R)*(R/(Delta[p]))^(4) ,R>a,(q^(2)*6.67*10^(-11)*M[Star])/(2*R)*((a)/(Delta[p]))^(4) );

PDE1:=diff(S(R,t),t)=(3/(R))*(diff(R^(1/(2))*(diff( S(R,t)*R^(1/(2))-(2*Alpha(R,a)*S(R,t)^(3/(2)))/((6.67*10^(-11)*M[Star])^(1/(2))),R)),R));

Hi

Does anyone know how to export surface plot with multible surfaces to a file format that can be easily plotted using matlab?

Thanks in advance

Regards Brian

I am brand new to maple and im having a very hard time. My teacher gave us an assignment but he didnt teach us how to use maple.

 

Can someone please explain to me how i can find the horizontal asym. of sqrt(9*x2 - 4*x + 2)+ 3*x - 5?

 

and how would i find the x and y intercepts?

 

thanks a lot

 

 

 

 

Hi all, Being new to Maple, I have a rather trivial question for most out there. How does one plot x=ln(y) or any function x=g(y) to be more general? I have worked with implicitplot() as such, but it only feels like drawing a straight line for x=ln(y). Here is the syntax I used: > g := y -> ln(y) > with(plots) > implicitplot(g, x = -10 .. 10, y = -10 .. 10) Does maple expect the assignment of the full equation (i.e. g:= x = ln(y)) in order to process inverse or implicit functions? I'm obviously borking the syntax. I have searched through this forum and the help. Any information is thoroughly appreciated in advance. Phillip

Hello if you can help I would really appreciate it.

I have a loop that gives me real, complex and imaginary solutions, and a few zero solutions. I am only interested in the zero solutions and so i only want to see what my input values are when the solution is zero. All i need is some command to discard all solutions except the zero solutions at every interval of the loop so that i can see the corresponding input values.. I tried selectremove but its not really working, is there a way to do this? If this doesnt make sense i can clarify more.

(&sum;)a[ijk](t)(x^(j))^((k))+b^(j)(t)=0,i=1,..,n.

click enter,and the font will be automatical converted to Times New Roman

but with error information about my subscript (j,k)

Hi wizards,

I've recently migrated some Maple-based research to an 4-way AMD 64-bit system running Linux Ubuntu 9.10 (Karmic Koala). installed Maple 11.02, and thanks to previous forum posts I was able to resolve the blank document window problem, and was able to install a version of libstc++.so.5 that is required by NLPSolve in this version of Maple. Although I picked it up in a forum that claimed to distinguish between 32-bit 64-bit versions, it looks like I'm not out of the woods yet. In response to an Optimize call, Maple returned

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
 

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.