opoly := (1-x^2)*diff(f(x), x$2) - x*diff(f(x), x) + n^2*f(x) = 0;
sol := op(2,dsolve(opoly));
gen := sum(cos(n*arcsin(x))*y^n/n!, n=0..7);

with(gfun):
seriestoratpoly(series(gen, z, 8), ['egf']);

error not a series, why?

seriestoratpoly(gen, ['egf']);

refere to the following link, it is possible to use a few terms to calculate a generating function, but where is the function generating? how do it  work in gfun?

http://www.google.com.hk/url?sa=t&...

opoly := (1-x^2)*diff(f(x), x$2) - x*diff(f(x), x) + n^2*f(x) = 0;
sol := op(2,dsolve(opoly));
P := sum(cos(n*arcsin(x))*z^n/n!, n=0..7);
with(gfun):
algeqtoseries(P, x, z, 7, true);

Error, invalid input: gfun:-algeqtoseries expects its 1st argument, Pol, to be of type polynom(anything, [x, y]), but received 1+(1-x^2)^(1/2)*z+(1/2)*cos(2*arcsin(x))*z^2+(1/6)*cos(3*arcsin(x))*z^3+(1/24)*cos(4*arcsin(x))*z^4+(1/120)*cos(5*arcsin(x))*z^5+(1/720)*cos(6*arcsin(x))*z^6+(1/5040)*cos(7*arcsin(x))*z^7...

Hi,

How to solve this equation?

Any Idea?

Thx

1.778895759*Sigma-1831241.099/(76553.66445-.576e-5*Sigma^2)+6600.970252*Sigma/(76553.66445-.576e-5*Sigma^2)+.5739576533e-1*Sigma^2/(76553.66445-.576e-5*Sigma^2)+.4735119433e-4*exp(.7618258041e-2*Sigma)*Sigma^2/exp(.9051395693e-5*Sigma)/(76553.66445-.576e-5*Sigma^2)-39332.76308*exp(.7618258041e-2*Sigma)*(41.17+1/(1-exp(-160)))/exp(.9051395693e-5*Sigma)/(-69.17083220+Sigma)/(-69.17083220-Sigma)-629324.2088*exp(.7618258041e-2*Sigma...

Hello!

 I'm new to maple and I'm having some difficulties with coding.

I'll explain the problem

I have 2 vectors, a1 and a2, and I want to make a new set of vectors R(n,m) where R(n,m) = n*a1+m*a2 for n and m from 1 to 100 (as an example). This will create n*m vectors (in this case 10000) that will be marked as R(0,0), R(1,0), R(0,1), R(1,1), R(2,1), ...

It seems as though this would be simple but I haven't found a way to get the repetition statement ...

Whenever I try to plot a simple/small function in 2d, Maple literally takes forever to calculate it whenever the frame rate is too high.

For instance, the following command (from a tutorial, so it should work):

animate( plot, [exp(-x/5)*sin(x),x=0..t], t=0..20, frames=100 );

Will not compute, unless i change the number of frames to 50 or below.

I tried this on a friends computer (he has a mac, but has way weaker performance) and it worked just fine.

Hi,

I was wondering if it is possible for me to generate plots from command-line Maple. What I need to do is access a linux server remotely via PuTTy and then set Maple running on creating a plot (that takes it a couple of days). Is it possible to do this?

I can't seem to find out how after googling for a while, I was thinking it would be something like "maple <inputfile.mpl> outputfile" on the command-line then I'd just let it go and it...

Hello,

To label plot axes as Greek letters, one should use the "labelfont=[SYMBOL]" parameter, but this option makes both axes in Greek letters. Is it possible to make only the horizontal axe as a Greek letter, while the vertical axe remains as an English word?

Thanks in advance.

I have a procedure, lfGn, with two or three real arguments, and I wish to find the maximum value of the procedure.  I was trying the Optimization package, and found this to be extremely slow.  Optimization was called with the following code: the first few lines just set some variables, for use in the last line, which does the call.

max2lfGn := proc (X::Vector) local a, d, e, f, H, m, s;
e := 10.^(1-floor((1/2)*Digits));
a:= Statistics:-Mean(X);
d := Statistics:-StandardDeviation(X);...

Mazimize only gives me the first maximum it finds. I want to find all maximums in an interval, or just the largest NUMERICALLY. is there a workaround?

I should convert factors of a generic equation into standard form (scientific notation) :

 example_eq := 345.1234 x1(t) + 34.5691 u1(t) - 5423.8932 y1(t) + ... many other terms...

Is there some maple command or procedure to convert automatically every factor of a generic (very long)   equation ?

Manipulating a system of long equations maple gave in output the following error message:

I have a function in maple with one variable (say f=2*x). I would like to generate a nx2 matrix with the variable (x) in the first column from 0 to 100 and the function value (f) in the second column. I would then like to export this numerical data. How can I do this in Maple?

Problem exporting labels.

 'labeldirections' = [horizontal,vertical]

displays properly inline, but the labels vanish when exported.

 'labeldirections' = [horizontal,horizontal]

doesn't work either, but if omitted altogether the labels are properly exported with plotsetup(ps)

So we've also lost the ability to export vertical labels.

Based on the dates of some plots I produced in earlier work, it looks like some export...

sc_vs_t.mw

sc_vs_t.pdf

I want the solution of an ODE for different values of d say d=3,4,5,6... etc (see the mw file). I want to plot a(t) vs t for these different values of d.

Now what is wrong with my code ?  How to fix it ? 

I also  added a Mathematica work of the same thing (see the pdf) ,...

Dear guys, Can anyone tell me why my program does not work for some initial values? All my equations are:

> alpha := (6*h^2)^(1-n)*(1-k)^(1-n)*((1-m+k)/(2*n-1-k));

> eq := z-> 1=(m*(1+z)^3-k*(1+z)^2)*h^2/(H^2)+(((2*n-1)-(k*(1+z)^2*h^2/H^2))*((1-m+k)/(2*n-1+k))*((((H^2/h^2)-k*(1+z)^2)/(1-k))^(n-1)));

> Y := z->if not type(z,numeric) then 'procname(z)' else (fsolve(eq(z), H=h)) end if;

> l := dsolve({D(L)(z) = L(z)/(1+z)+(1+z...

lets say I have the folowng

a:=1

b:=3

c:=5

is it posible to have it like this

h:=a+b*c=1+3*5=16