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

 

Can anyone give me a good example of MultiThreading in Maple  with(Threads):

I looked in the help files but I could not find anything good. The example should include a loop

which is running in the background while the user is doing other things simultaneously in Maple.

 

The loops could be using a time delay to slow it down

st := time[real](); while time[real]()-st < 5 do  end do ;

The output from each iteration should be displayed in a math container so we can see that it is working.

I wish to know if there is a maple command to extract the coefficient of a specific monomial in a polynomial. For example, if we have a polynomial f(x,y,z), how can we extract the coefficient of the monomial x^2yz^3 in f with a maple command?

Thank you in advance.

I am trying to import about 1400 data entries from a .txt file in a vector. The file contains three columns of data, and I need to export only one of them. I tried using readdata command, however I get an error; I might not be specifying the path of the file correctly. What is the right way to specify the filename path using readdata command on mac? Apart from readdata command, are there any other options? Thanks in advance, SDK

Is there any function that we can get the row and column of a given component? What if there is several cases? e.g.

restart:
M:=Matrix([[1,2,3],[-4,5,0],[3,9,4]]);
max(M);

what is the coordinates of 9 which is the max in the matrix? What if we had another 9 somewhere else in the matrix?
 

I want to print a message in the results section with red color. How can I change the blue color JUST for that message. e.g.

print("The calculation was interrupted");

Hi all

I was just wondering if it was possible to add extra expressions to the expression palette?

/Simon