Hi all,

I am trying to add the two expressions in MAPLE 15, but it returns exactly the same expression back, is there any way I can add these two expressions?

Please find the attached file

mapleprimes.mw

Thanks in advance

A.Q

Soton

I am trying to solve a tricky system of diff eq....can somebody point me in the right direction, the error message is involved with the initial conditions..

I have 2 column vectors I am trying to plot against each other. The vertical axis needs to be logarithmic.

If I say

plot(mass,map(log,pressure),style=point);

it works and I get all 19 points.

If I say

logplot(mass,pressure);

I get the correct scales in both directions (so nothing would be cut-off) but it plots only 4 points.The same happens if I use plot(...,axis[2]=[mode=log]);

The pressure values range from 1E-7 to 1E-12....

Hello, 

I am trying to solve a simple equation 

x(0.0178){tan([2.10^-5](x)^0.5)}^2=+2.32.10^12-x, which I want to be solved over the range 1.10^10......2.10^12.

I have tried the following program (which I have got help on):

restart; 

eq := x(0.0178)*tan²(Sqrt(x)*2E-5) = 2.32e12-x;

Hi all,

I have a function which Maple is happy to integrate from -100 μm to +100 μm,  but won't do between -60 μm and 100 μm.  Screenshot here:

 http://oi39.tinypic.com/34jdif9.jpg

The graph of the function reveals no obvious reason why it shouldn't be able to integrate from +infinity to -infinity (which I'd like to be able to do) and everything in between:

How to solve the  partial derivative at a specified point

The latex code is

f(x,y)=x+(y-1)\arcsin\sqrt{\frac{\,x}{y}}

f''_{xx}(x,1)

Hi,

Is it possible in maple to estimate a density using my own kernel function (Gamma; Beta, Exponential...) instead of the  default kernels ( 'gaussian', biweight, epanechnikov, triangular, rectangular)?

Hallo,
I have to estimate a logistic growth function, with the functional form
f(t)=A/(B+exp(-k*t))
The dataset is given by

X:=[1950,1960,1970,1980,1990,2000,2010];

which describes the values of t
and by

Y:=[2.53,2.76,3.12,3.75,4.2,4.3,4.35];

which describes the values of f(t).
I now have to estimate the values of A,B and k.
I tried NonlinearFit by

with(Statistics):
NonlinearFit(A/(B+exp(-k*t)),X,Y,t);

I have something like E1:=y=x*b+z*a+c*i. and i want to solve for y/i. I try doing solve(E1,y/i) but it says i cant solve for an expression. is there a way to get around that?

I have a set of test equations. I am substituting the coefficients of the variables A₁ ..A₄ and the constants in the equations. Most of this I have made work fine. There are 2 coefficients I cand make be substituted. In eq₁ k*d the coefficient of A₃ and eq₅ 3.1d² also the coeff of A₃ .Have tried subs and algsubs but can't make it work. The reason I want to do this is in reality I have 15 equations...

It is pretty easy to get the principal value of the logarithm of the imaginary unit, say. Is it just as easy to get all values of the logarithm of the imaginary unit?

Forgive me if this is a duplicate, but I couldn't find a similar questions.

Thanks!

Hello

I am using Maple 15 on a Macbook Pro, and I was using this simple code

   restart;with(LinearAlgebra):
     P := Matrix(4, 4,    [[1, s, t, 0], [0, 1, s, 0], [0, 0, 1, s], [0, 0, 0, s]]);
DiagonalMatrix(Column(P, 2)).P;

which should be easy but then Maple gives me a pop-up message:

"Kernel connection has been lost.  The kernel returned the following error message:

Hello everyone.

I have 2 systems of differential equations which depend on variables from each other, of course the differential variable for each is different. 

Not to get into the details of the system, since they are rather large, the problem is as follows:

I've managed to get with the parameters option a solution for x(z), in essence x(parameters=[a,b])(z). I've managed in turn to generate a procedure that would give me the avg value of x (xm...

Hi,

If I click on the "Edit Startup Code" button, key in "with DEtools;" (sans quotes), save it and close the Startup Code dialog, the "Edit Startup Code" button in the toolbar is filled (indicating startup code).

If I then close Maple and re-open it the startup code is gone.

As I thought that the startup code was for all sessions, I am wondering what I am doing wrong.

Any help appreciated.

regards,
Andrew

Here is the problem:

plot3d(y+2 x^(2),x=0..1,y=0..h(x), axes=boxed) and h(x)=1+sin(x)

what should i do to make it work?

Thanks for help~~