Hi all! I have a list of data. I can use pointplot to plot them. Now, whatshould I do if I want to connect (join) these points toghether like an ellipse or rectangle or others form? For example:

S := [[1,1], [3,1], [4,2], [3,3], [2,3], [1,2]];

thanks  

Hi,

Can i use method=laplace to solve an ode with no initial condition?

ode := diff(phi2(x),`$`(x,2))-Omega0*diff(phi2(x),x)-k*R1*E1/C*sigma*phi2(x)-l^2*phi2(x)+2*R*k/C*N2*exp(Omega0*(x-1))*cosh(l*(x-1))*l*C2/exp(-l) = 0;

bcs:=phi2(1)=0,phi2(S0)=-N4*Phi;

sol := dsolve({ode, bcs}, phi2(x), method=laplace);

Thanks

I have uploaded to the Maplesoft Application Center a worksheet exploring the orbital dynamics of the recently discovered Kepler 16 system, where a planet orbits a double star. 

Your comments and suggestions will be appreciated.

Good night.

I have a problem with this error "Error, (in unknown) invalid input: `dsolve/numeric/lexorder` expects its 2nd argument, b, to be of type {indexed, name, numeric}, but received cos(t) "

help me please

final-robot-circul.mw

Hey,

I have one function that is consisted of several matrices.. The function is,

R := log(determinant(MCOV))+trace(multiply(SCOV, inverse(MCOV)))-log(det(SCOV))-2+Transpose(SM-TAU-multiply(L,K))&*inverse(MCOV)&*(SM-TAU-multiply (L, K));

where MCOV, SCOV, SM,TAU, L, K are all matrics. In a MCOV and L, there are symbols also..

I have tried to get...

Hi, I have 2 sets of data:

P := array([1.23, 1.15, 1.10, 1.20, 1.35, 1.25, 1.28, .99, 1.22, 1.25, 1.30, 1.05]);

Q := array([892, 1012, 1060, 987, 680, 739, 809, 1275, 946, 874, 720, 1096]);

p=P(t), q=Q(t) i.e. both p & q are a function of parameter t  t=1..12

2 functions: 

x=ln(p)

y=ln(q)

I'm trying to display x against y , ie x=ln(p) on the horizontal axis, y=ln(q) on the vertical

Dear Mapleprimes,

I'm trying to add a sequence of numbers using the add command. It appears that it can only add up to a specific number. The following works:

add(2*i, i=1..5)

gives 30.

But it is not possible to do:

add(2*i, i=1..n)

such that n is a parameter.

Does anyone know how to add a finite series of values where n is unknown?

I have a question in Maple TA that is asking for an answer in radians, and when I post the answer that I get it does not accept it...I'm assuming I'm doing the problem correctly, but my answer is not in the correct format.

Hello everyone

I have a function, constructed by numerically solving a set of differential equations.  I need to find a best fit for this function with an analitic model with two parameters. I tried to extract some points of this function and then using nonlinearfit:

xvalues:=Vector([seq(10⁵ ..10⁶,10⁴);

yvalues:=Vector([seq(evalf(function),x=10⁵ ..10⁶,10⁴)]);

with(Statistics):

Hello,

I have a derivation to do for my PhD thesis, and it is long and tedious. It is essentially a case of splitting sums, making substitutions and then simplifying. I believe maple can do this for me, but have not found how yet. Any suggestions would be more than welcome. I have done this for a third order problem (three nested sums) and the derivation runs to many pages. I now need to do so for the 4th order problem, and it is a more than daunting prospect

In polar coordinate, when we differentiate e_r, it becomes e[theta]. However it seems Maple can't do this, even I have set it into polar coordinate.

How can I allow maple to do this?

Any Example can help see the difference between contour and simple integration?

int(XXXX, x, method = contour);

int (XXX, x)

which example can help to see the difference?

hi

I wan`t use maple to solve my problem

x₁[n]= e^{j*( Π/6) *n}

Hey, so i guess i dont really know whats going on. I am trying to install Maple 10 on my Macbook Pro. I get an error message Uncaught exception in main method: java.lang.NoClassDefFoundError: org/apache/crimson/parser/XMLReaderImpl when i try to open the program. Any help?

How to make maple to change ln(exp(x)) = x?  for example exp(ln(x)) = x, or ln(exp(x+1)) = x+1