Hello,

I have a matrix of 2x2. the elements for example can be [x, x^2; 3x, 10x]. The determinant must be zero. Numerically, how do I construct a loop that finds me the solution of x?

Thank you.

> D := 5;
Error, attempting to assign to `D` which is protected
 

Dear Maple Users

I am still pretty new to Maple. I know it is possible to plot a set of x-values against a corresponding set of y-values, like:

> plot([[0,3], [1,7], [5,14], [6,17]])

but how is it done more conveniently? I mean, if I want to import data from another program and I have copied the data from two columns to the clipboard, how do I plot the first column against the second?

Regards, Erik V.

I would like to try the polynomial fit curve to the data points that I get below.  The data is for melting temperatures vs bond energy. 

> with (Statistics):
> Temperatures := <801, 2800, 1410, 3551, -39, 660, 1538, 3410, -189, -101, -78, 0>:
> BondEnergy :=  <3.3, 5.2, 4.7, 7.4, .7, 3.4, 4.2, 8.8, 0.08, .32, .36, .52>:
>
> BondEnergyFit := Fit (a+b*t+c*t^2+d*t^3, Temperatures, BondEnergy, t)

I have tried to programme a bubble sort procedure below and i'm a bit stuck and not sure where i've gone wrong. Many thanks.

 bubblesort:=proc(C)
local n,o,r,k,i:
n:=rtable_dims(C):
o:=rhs(n):
r:=lhs(n):
for i from r to o - 1 do
if C[i] > C[i+1] then
(C[i], C[i+1] ) := (C[i+1], C[i]);
else
(C[i], C[i+1] ) := (C[i], C[i+1] );
fi:
od:
return(C);
end proc:

 C:=rtable(1..6,random(1..50));
bubblesort(C);

C:=[44 5 38 37 3 15]
[5 38 37 3 15 44]

Hola,
How to ensure that the coefficients are displayed in a more understandable?

Hi,

Below, you will see a serie that I would like to obtain in Maple.  Any way I trie I am stick with Pi.  Any ideas?

Thanks in advance.

--------------------------------------
Mario Lemelin
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

I am trying to plot a two variable expression in single 2D plot but have been unsuccessful.

I already have an equation in two variables that is obtained through a lengthy process of calculations:

DEQ = A*D + B*Ne, where A and B are constants, and D and Ne are variables.

I can easily plot a 3D graph of this, but I'd also like to plot what are essentially slices of the 3D graph onto a 2D graph. Actually to plot several slices on a single 2D graph.

I have tried to do the following but have been unsuccessful:

Below is my attempt at a cocktail sort, there are two lines of code missing as i am unsure as what to put there. I think the rest is correct.

Please check and see if you can spot what i need to include.

Hi Maple users,

I have a license for the Global Optimization Toolbox (GOT) 12 (i.e. for Maple 12). However, it seems it cannot be installed under Maple 13. As the GOT is essentially a frontend for an external library, I find this restriction a bit artificial and annoying. I don't see a reason why I should buy a new license for something that is practically the same that I already bought...!? Do I overlook something? Is there a simple way of installing the GOT 12 under Maple 13? Thanks for any hint!

quantum

Is anyone aware of Maple code intended to do some of the floating-point stress tests like are done in Kahan's paranoia code? (See here.)

I realize that modern Maple claims to comply with IEEE 854, 754, etc. But I like to check some things for myself. Call me paranoid. ;)

acer

How do I get a,b,c,d to the function a*b^x*c^y*d^z-x-2*y-3*z  get the minimum with {0<x<1,-1<y<1,-1<z<0}?
Thanks in advance !