I am working with matrices in maple, and just have a couple questions.

a) how do you make a matrix value "symbolic", and what does this mean (ie: i have a variable "j" in one of the matrices that I need to make symbolic).

b) when I go to do simple matrix arithmatic, and it doesn't compute, I get long errors.  How should I go about cleaning up these errors for the final document that I am creating?  Also, when do you need to call on the "linear algebra" code/package, and how do you go about doing this?

Thanks

Hey,

I am trying to solve a polynomial function for which there should be two solutions for x (it is just a standard x^2 +ax +a type equation, but I am a complete newb to maple and can only seem to get one solution for x.  Can you please tell me exactly what I need to enter to get all solutions for x.

 

Thanks

Hey,

I am trying to make a 3D plot of the following, but when I enter it, I am only getting the option to do a 2D Implicit plot for some reason.  Can you please tell me exactly what I need to enter, so I can make a 3D plot?

G(x, y) = e^(sinx) * cos(y)sin(xy)

Thanks...

I have a differential equations system with initial condition which contains complex numbers, but there is an error which says "dsolve/numeric can not solve with complex number the system must be converted to real system".

What should I do? how do I solve a differential equations system with complex initial values with maple?

Thanks....

<p>Good Morning Everybody,</p>
<p>I'm wondering what is wrong with the Maple code below, the worksheet works but Maple could not read L[1], L[2], L[3], and L[4] from the list param to give numerical solution. Would anyone be kind to tell me what is wrong with the code.</p>
<p>Regards,</p>
<p>restart:</p>
<p>n :=4</p>
<p> > n := 4;<br />
print(??); # input placeholder</p>

I am trying to build a portfolio optimization model from simulated data. I start by defining the very large

correlation matrix and then I apply Cholesky decomp to get the cross correlated simulated data. However

I systematically get the warning message:  Warning, Matrix is not positive-definite. It is extremely difficult

(if possible at all) to specify a large correlation matrix that is positive-definite.

 

Hi all,

I need to obtain the partial derivative of the following functional, with respect to "a" and "b":

for example, diff(p(a(t),b(t)), a) or diff(p(a(t),b(t)), b)

I am using Maple 12, but it returns 0 while using the above command. Does anybody know how to enter the correct commands?

Thank you in advance,

Saeid

 

Hello all,

 

I've been trying to recreate a simulation from a textbook, and the system of equations needs starting values to solve correctly. I've supplied all of the information that another program uses, and the degrees of freedom make sense, and I can even solve it with fsolve. However, as I try to supply the starting_values to the fsolve, I get the error "fsolve cannot solve on starting_values(...". Any help appreciated. I'm attaching the file...

 

Thanks in advance,

 

Fred

 

I am trying to learn to love Maple's document mode... I would like to be able to display a matrix formula or equation without evaluating it. One way to do this is with the following commands:

  with(LinearAlgebra): `print/&.` := proc (l, r) l.r end proc
  pq := <<-P^2, -P*Q+c>|< P*Q+c, Q^2>>
  2*<g.P, g.Q> = pq &. <alpha, beta>

(Paste them into a worksheet in document mode and press Enter to execute one at a time.)

Hello, the equation I have is of the 4th order and rather long. If i assign values to four of the five parameters then maple gives me four numerical solutions. however if i try to solve analytically with at least two or more parameters then maple cannot find the roots.

is there a way around this?

thank you

 

Is it possible to type special characters such as Newton notation for derivatives i.e. x with one or more dots above it - or X with a bar above it to signify 'mean' in statistics etc. I want to be able to use these to print text-book quality documents. Are these characters available as maths input?

Hi, I solved a differential equation which is: ode := diff(y(x), x) = 2*(e1*m_b*sqrt(y(x))+m_b*psi+m_b*c1*(R0^2-y(x))); dsolve(ode); but the answer that I got is: x-Intat(1/(2*m_b*(e1*sqrt(_a)+psi+c1*R0^2-c1*_a)), _a = y(x))+_C1 = 0 How can I interpret this answer? Thank you,

Good Day Everyone,

My first question is with regards to sequence function in Maple. I have input into Maple the following

xp := map(z->z*[ft], [0.0, 3.3, 3.3, 0.0])

yp := map(z->z*[ft], [0.0, 0.0, -3.3, -3.3])

npile := nops(xp)

d := [seq(sqrt((xp[i] - xp[i + 1])^2 + (yp[i] - yp[i + 1])^2), i = 1..npile)]

I was getting an error message from Maple, "Error, invalid subscript selector", what have I done wrong in Maple?

 

I want to plot a set of points in Maple and have a graph drawn through them, then find the tangent to the graph at one of those points and, finally, find the slope of that tangent. If you can help with any of these steps i'd appreciate it.

V:=Vector([[0],[0.0003060109290],[0.0003327659830],[0.0003351052226],[0.0003353097460],[0.0003353276280],[0.0003353291916],[0.0003353293282]]);

 

I have this vector that shows my results converge. Is there any way to plot this that shows a curve that my results converge, I plotted using different ways but it still looks like a line not a curve