restart:
 NEWTON_RAPH:= proc(f,z,M)
   local x,A:
    x := z:
    for A to M do:
      x :=  ( x - ( f ( x ) / D ( f ) ( x ) )  - ( ( ( ( D@@2 ) ( f ) ) * ( ( f( x ) ) ^ 2 ) n ) / ( 2 * ( D ( f ) ( x) ) ^3 ) ) )
       end do:
    evalf(x):
  end proc:
 f:= x-> x ^ 2 - 5:
 NEWTON_RAPH(f,1,10);

I have this function: f(x):=x*sin(x^(2))+1 The function is defined in the interval [-1;3] and the diff: df := sin(x^2)+2*x^2*cos(x^2) But when I try to find out where the diff function equals 0: solve(df = 0, x)*assume-1

I trying to solve the following matrix

A:=Matrix([[alpha_O-E, beta_CO, 0, 0],[beta_CO, alpha_C-E, beta_CC, 0],[0, beta_CC, alpha_C-E, beta_CC],[0, 0, beta_CC, alpha_C-E]]);

by setting the determinant to zero and finding the roots in terms of parameters alpha_O, beta_CO, alpha_C, and beta_CC.  I have tried to use solve which returns

Look at the link below, for image! http://img109.imageshack.us/img109/3676/problem.png Thanks, Jonas

View 12077_PR2COPY.mw on MapleNet or Download 12077_PR2COPY.mw
View file details

 

I have uplaoded my maple worksheet.The problem is that I need to modify my differential equation according to  value of a given variable.I donot know how to do that.

I was checking out a problem that graphically solved e (2.71828....) etc..

A procedure was created to find the slopes of incremental numbers between 2 selections.  The procedure was in it's simplest form like this

E := proc(c,d)
plot({(c+(d-c)*j/10^x-x-1 $ j=0..10}, x=0..(d-c)/1000,xtickmarks=0);
end;

Now so I start the process

E(2,3);

The slope closest to 0 and just under will determine my next decimal point.  So I find the next number as 7.  I continue finding more decimal points graphically using the procedure.

I am new to Maple 13, I have a data set that I can fit a b-spline curve to and out put the polynomials. I plot the the curve but I want the predicted values of the curve so I can compare them to other predicted values from other programs (eg SAS). I want to plot all the curves from each program in Excel against to actual values. Here is my worksheet for reference: Loading CurveFitting Loading plots Loading plottools

Hi

I have managed to plot the phase portrait for the system

dx/dt = -4x(t) + y(t) + 2

dy/dt = 2x(t) - 2y(t) + 3

but i dont know how to plot the equilibrium lines

-4x + y + 2 = 0 and

2x - 2y + 3 = 0

on the same graph preferably in a different colour.

If anyone could help that would be great.

thanks

I'm trying to solve:

Hello,

I have a program where a system of DE's is solved numerically then some calculations are done to the result..

let the solution of the DE's be y(t) then we have:

A(t) = some function of y(t)

B(t) = some function of A(t)

C(t) = some function of B(t)

Those A, B and C are actually complicated formulas including sums, matrices... etc. So it's not possible to combine them in one function.

Then we'll plot C for a specific period of time.

 

My questions:

Hi

I'm dealing with a symmetric matrix with numerical values, very high values, e.g. 10^(50), let's call it low_index

Maple computed the inverse with

up_index:= MatrixInverse(low_index);

 

Hi, When I'm in document mode, whenever I type 'Re' in an equation, it turns into 'script R', which I don't want. How do I turn this auto-formatting off in general? Thanks, Steven

Let say I have a list like     L := [1, 2, 3, 4, 5, 6, 7, 8, 9, -5, -0.2];
 

Now I want to use the ListTools:-SearchAll() command and return the list index for all the

list element that are negative. I tried ListTools:-SearchAll(x < 0, K);  however that did not work.

The solution could also use a similar and simple command ....
 
 

Hi, I need to plot the curve specified by t->(t,t^3) as well as its osculating circle at several points. I know how to compute the radius of the circle but I have no idea how to get the whole thing.

I tried the following:

Alright all im really stuck on this maple question and its been bothering me for some time and i was wondering if you lot can help me out, heres the Q;

Im still getting used to maple, so forgive me for any stupid questions i may have. Thanks, David.