I want to connect Maple to a database with around 10 000 time series.
I have played around with Microsoft Access, SQL Server and MySQL.
However, none of them seems to be up to the task.

One of the problems that I had was that the connection (tcp-ip) between
Maple and the database was very slow also the databases them self did not
handle the large amount of data very well. Maples database
examples are not very helpful either. They only show "cute" examples

There is a cool option of dropping one graph from multigraph (after that it goes as separated one). How to get  this dropped structure itself? I.e. i have "graph" component with command AllPlots that itself is

AllPlots:=plots[display](AllPlotsStructure,...);

AllPlotsStructure is a list of plot/textplot.

After all i removed one structure by drag-and-drop on component. How to update AllPlotsStructure correctly?

Hi!

I have a sequence of difference polynomials (which I obtained by the method of finite differences) and I would like to find out if there is a recurrence relation between them.

The generating function of general difference polynomials is given by:

I tried to solve a non linear coupled boundary value problem in MAPLE using DSolve command. The code is :

alias(eta = e, theta = t)

Eq[1] := 5*(diff(F(e), `$`(e, 3)))+(m+3)*F(e)*(diff(F(e), `$`(e, 2)))-(2*m+1)*(diff(F(e), e))^2-(4*m+2)*H(e)-(m-2)*e*(diff(H(e), e)) = 0

Eq[2] := diff(H(e), e) = t(e)

Eq[3] := 5*(diff(t(e), `$`(e, 2)))/Pr-(m+3)*F(e)*(diff(t(e), e))-5*m*(diff(F(e), e))*t(e) = 0

BCs := [F(0), (D(F))(0), (D(F))(infinity), t(0)-1, t(infinity), H(infinity)]

Is there any command in Maple 15 to linearize an PDE non-linear? Or or there is a package or help file to do so?

I'm handling with Non-linear PDEs in my work and I would like to solve them by these methods.

Thank You

Washington Inacio

It's possible to define a field in Maple 15 with 2 kinds of indices, say type spacetime μ,ν,ρ... and one of the type integer, i,j,k varying from 1 to n?

I would like to define a field like A_μⁱ where:

A_μ¹=A_μ

A_μ²=B_μ 

and so on.  

Thank you Washington Inacio

Write the equation for the plane P contains the straight line 

d: x = 2 + t, y = t, z = 2 + 2t,

so that, the distance  

Problem: Write the equation of the straight line (d) through the point A(1,-2,3), cut the straight line 

Delta: x = 3*t+1, y = t, z = t-1 and parallel to the plane (P): x + 2*y + 3*z + 4 = 0.

We know that, if the straight line (d) through the point A and parallel to the plane (P), then (d) lies on a plane (Q), which (Q) through the point A and parallel to the plane (P).

i need to write a program for my calculator to solve these eqution 

Vr =any number i enter it

Ir =any number i enter it

L= any number i enter it 

Z= any number i enter it

Y=any number i enter it

w=sqr (ZxY)

Zc= sqr (Z\Y)

A=D= cosh wL

B=Zc sinh wL

C= (1\Zc) sinh wL

Vs = AxVr + BxIr

Is = CxVr + DxIr

Vs= the number we get from the Vs eqution 

Ir = the...

I am learning about programming; I have this equation:

2*K2*alpha*t=ln[(A0+E(beta-1/2)/(A0-E(beta+1/2)

The values of t, E are a list of values.

and K2 alpha and beta are unknown but i dont know how to do for graph the part of ln vs time and fit it to a line.

How can I show that the Least Square solution x = (A'.A)^-1.A'.y
Is different when A is an orthogonal matrix compared to an
overdetermined or underdetermind matrix.

Preferably transform the matrix using Singular Value Decomposition (SVD)
or something similar.

Thanx

For LSSolve I have the objective function as a procedure that calls another procedure (procPatientres) according to below:

p:=proc(x::Vector, y::Vector)

y[1]:=procPatientres("patient specific parameters", x[1],x[2]);

y[2]:=procPatientres("patient specific parameters", x[1],x[2]);

end proc;

This is a test example where I only fit to patients. Since the returned residuals, y[1] and y[2], are just values the first derivative is simple zero and I...

Does anybody know how to configure the model to obtain the position constraint equations of a slider-crank mechanism as:

l1·cos(theta)+l2·sin(beta)-s = 0
l1·sin(theta)-l2·cos(beta) = 0

instead as obtained in the help-example on:
http://www.maplesoft.com/support/help/MapleSim/view.aspx?path=MapleSim/Multibody/Kinematic_Exports

Thanks in advance

Im asked on one of my problem sheets to write a procedure to inverse a square matrix using LU factorization and using partial pivoting. I can do all of these using simple pen and paper but am struggling towrite the procedure, especially to involve the partial pivoting and to then solve the linear system. Any ideas how I can do this question?

Hi all,

I have data which I want to give a simpler and a smaller interpolation function. Not necessary with Cubicspline as in the code attached (polynomial, exponential, etc..).

Thanks in advance

interpolation.mw