If we run the below code we will get a plot of a pure unit root and the serial correlation parameter for a pure unit root

My question is why do we have such a large amount of serial correlation in a process that is supposed to be random?

I ran a simulation and found that the average serial correlation for a 100 pure unit roots was 0.941

It does not seam right.....am I doing something wrong here?

I thought the basic definition of a random variable was serial correlation=zero.

 

Hello everyone,

I can't succeed in obtaining the complex conjugate of a function like this:

 suu:=x->( e^(-Iq(x)b)*(cosh(q(x)*b)) )^2 - I*sinh(q(x)*b) * e^(-4iq(x)b)

where q(x) is:

q(x)=sqrt(2*m*(V-x))/h

and m, V and h are respectively mass of electron, 1 eV and Plank constant /2 pi.

what I need is |suu(x)|^2 (where the * stands for product and not for complex conjugate!) but succeding in obtaining the complex conjugate of the function wold be enough.

 

Can you help me?

Hello:

I am using Maple11 for an Adv. Computer Applications Lab.  I am being directed to use the "implicitplot" function to plot a polynomial, and also plot a previous function that used the "spline" command to plot it on the same graph. 

Can someone please offer a suggestion?

Also, for the polynomial. how do I find all "x,y pairs? " I used the "solve" command to evaluate for 'x' and then 'y'. 

Is this correct?

Hello there,   the attached worksheet gives several examples of how to create implicit plots without commands and with commands.  

 

Howdy,

I am making a maplet that guides a user through crafting a Taylor series equivalent of a function. Obviously this involves finding a formula for the nth derivative of the function. Can Maple calculate this?

I need help with a coursework question. Would be greatful if anyone could help!
the question is: solve this x[i-1] + i*x[i] + x[i+1] = i where i=1,2,...n and x[0] = 0. Give your answer in decimals.

wat method would you use to solve these equations? the code I have put in is:

x[0]:=0:
for i from 1 to 3 do:
  eq[i]:=x[i-1] + i*x[i] + x[i+1] = i
od;
eqns:=seq(eq[i],i=1..3):
sol:fsolve({eqns});   assign(sol);

am i on the right path? is there anything i am doing wrong? if so, what is it?

I am multiplying an n x n matrix by an n x 1 matrix of unknowns, y(x_i), to get the result of my particular solution.  How do I create an n x n matrix with a 3 term diagonal?  For example:

b   c   0   0   0   0

a   b   c   0   0   0

0   a   b   c   0   0

0   0   a   b   c   0

Hi all,

can someone show me the steps of how to do it? one of my points is a decimal, do i need to revert it to a whole number?

hey,

does anyone know how to find a cross multiple of 2 del vectors (delf and delg)?

they each have 3 variables x.y.and z.

thanks

 

i been stuck on the attached files for days and i'm stuck on the regression line

Hi,

I tried to get a 3D "surface" plot (comapreable to a matrix surface plot or matrixplot) of a list in the form:

[[xi,yi,zi],....]

where xi are the x-data, yi are the y-data and zi are some velocity data. Unfortunately I found only the possibility to draw a pointplot3d. Maybe anybody can help me.

Thanks

Dirk

<p>Hello! Its my first post.</p>
<p>I have been able to modify an example program. It uses the || operator to accumulate data into an object in the form of multiple polygonplot(...) objects. After the loop exits, I can do something like "display(obj1, obj2...)" and everything is displayed.</p>
<p>What I would like to do is instead of accumulating the data first, execute the commands to display from inside the loop of the procedure. This would hopefully eliminate the time lag before starting to draw, as well as allow me to draw more things.</p>

If my numbers is a decimal point, do i have to revert it to a whole number