In the name of God,

Hello dear experts,

I have a nonlinear multivariate system. By running fsolve and with the same initial values, 2 times, at the first time it yields the result but at the second time it doesn't solve. All of the settings in the both fsolve executions are the same.

Do you have any idea?

Best regards,

Recursive algorithm for finding the sum of the first n odd positive integers.

 procedure   odd_sum ( n: positive integer )

    if   n = 1   then   return   1

    else   return   

I think i'm missing something easy her , but I am trying to plot a circle and cannot figure out

what I am doing wrong. The equation for the circle is:

x^2+(y-3)^2=25

I define the equation

c := x^2+(y-3)^2 = 25

Solve it for y so I should be able to plot it with plot(cplot); :

cplot:=solve(c, y)

But what I get as answer is:

3+sqrt(25-x^2), 3-sqrt(25-x^2)

The equation of the circle is part of a homework assignment,...

Hi,

I'm working at the moment on percolation theory and, in order to get interesting images I use Maple to produce random spheres packing using the code below:

with(RandomTools):
with(plots):

x:=Generate(list(integer(range=0..20),100)): # random coordinate for x parameter
y:=Generate(list(integer(range=0..20),100)): # random coordinate for y parameter
z:=Generate(list(integer(range=0..20),100)): # random coordinate for z parameter
R:=Generate(list(float(range=1..3...

Hi all,

I read the help on using parameters, then I tried to modify the example

f := proc(a, b, c)

    if _params['b','c'] = NULL then
    a
    elif _params['c'] = NULL then
    a + b
    else
    a + b + c

    end if

end proc:

I can't really spot where it went wrong, but it just wouldnt execute as I would expect...

Hi all,

A := [[1,2],[3,4]];

A1:=convert(A, Matrix);

I am very happy with conversion between Matrices and Vectors.

However, I does not seem to be able to do this backwards to [row] or [column] Vectors???

Say how do I get back to A from A1???

I tried to use

convert(A1,Vector);

convert(A1,Vector[row]);

convert(A1,Vector[row],2);

And many others...

Hi, when I was learning to use the taylor-command I always get an error message that says: Error, (in series/abs) unable to compute series.

The exercise I was trying to solve was as easy as this:

> f:=x->sqrt(abs(x));

> plot(f(x),x=-5..5);

> taylor(f(x),x=1);

Error, (in series/abs) unable to compute series

Can someone tell me what am I doing wrong?

Many Thanks!

I use Hermit as example and try the following way, it can not sumtohyper,

how to get the hyper form from a differential equation?

restart;
with(gfun):
test4 := diff(P(x),x$2)-2*x*diff(P(x),x)+2*n*P(x)=0;
test4 := {diff(P(x),x$2)-2*x*diff(P(x),x)+2*n*P(x), P(0) = 1, (D(P))(0) = 1};
newtest4 := borel(test4, P(x), diffeq);
rec4 := diffeqtorec(newtest4, P(x), a(v));
rec4 := diffeqtorec(test4, P(x), a(v));
genfun := rsolve(rec4, a(v), 'genfunc'(z));

restart;
with(SumTools):
an := -n+L;
bn := -x+L;
gen := Summation(Product(an, L=0..k-1)*Product(bn, L=0..k-1)/k!*(-1/a)^k, k=0..infinity);
genfun1 := subs(a=z,simplify(gen));
genfun2 := exp(z)*(1-(z/mu))^x;

correct is genfun2

but using famous hypergeom of charlier written in many books and papers, it can not summation to a correct generating function

Hello everyone,

                       I have a par.mw file which contains a list of parameters. Now I have another reac.mw file in which I have to use some of those paramters. My question is what is the way for this without searching par.mw for those specific parametes values and then putting manually in reac.mw.

Following an earlier thread (Collect-And-Sqrt) where a solution using applyrule was proposed (and that solution works), I tried to use applyrule to implement some of the trig half-angle relationships. Immediately I ran into trouble:

Say I want to use the rule

r:=cos(th::algebraic)=2*cos(th/2)^2-1;

so I say

applyrule(r,cos(alpha));

and Maple promptly goes into an...

In some cases if not always, "fi" can be used to close an "if" clause, instead of "end if" and "od" can be used to close a "do" clause, instead of "end do".

These short forms are intuitive and can save a lot of space; for instance say you have 5 "do" clauses to be closed, it is a lot shorter to type "od:od:od:od:od:" than  "end do:end do:end do:end do:end do:"

Yet for some reason it does not seem to be a recommended short form. The Advaced Programming Guide (dated 2008...

HI folks ! I'm new to this forum and I have a problem with the Euler Method to solve equations.

In the method, there are 3 variables, x, v and t. I need to save the result from every step from the method of the 3 variables and then create a matrix with 3 columns (one for each variable) and any amount of lines.
Is is the best way to do it ? I'm having a lot of trouble at storing data into vectors. 

To clarify my problem, here is my program:

Based on past releases, after Dec 31 any hope of a 16.03 update becomes very very slim. 

You see, any last issued updates (back to Maple 11) have all happened before the turn of the new year.  And should we make it into the new year without one last update then we can almost be certain that Maplesofts focus is all on the next major release, Maple 17.

There is always hope, that a few more loose ends can be tied up before the next major release, however...

Hello,

I am working on a project where Maple's output is fed to another software which requires all it's input in specific format. So, I want to print this expression,say

y=+2.*x+.2, in this software, but it takes input as

y=2*x+0.2, So now I have to change

+2. to 2.0 or 2 (if it's starting of the equation)

-2. to -2.0

.2 to 0.2

Is there any way to convert all the numbers in the equation to...