Can I have maple show me the steps it takes to integrate?  Is this possible?

 

thanks!

Using the procedure permsPosNeg as given in the blog entry Positive and negative permutations, including the improvement obtained in the blog entry Refactoring Maple code, consider the following procedure:

Hi, I can't find any information what does FI mean, for example: f := proc(x) if x>0 then x else -x fi; end proc: f(-3); or: if iseuler(G) then continue else RETURN (print ("The graph does not have an Euler circuit")) fi; I'm tired of googling already, Maple Help doesn't have any information about fi, what might it be? perhaps some closing declaration instead of 'end if'? I would be grateful for any comments, thanks in advance, Sven

is there any way of creating a polynomial in maple from a list of coefficients (i could write my own function, but this is annoying, no?). specifically i would want an inverse to the PolynomialTools:-CoefficientList function, f([1, 2, 3]) would yield me 1 + 2*x + 3*x^2. i cant understand the apparent lack of such an elementary function, i must be missing someting? thanks

Hiya,

I have two questions...
Firstly when plotting a graph in Maple using plots[display]({A1,A2,A3}), is there anyway to switch the horizontal and vertical axes such that f(z) is on the horizontal axis and z along the vertical?

Secondly, I'm trying to plot a sum at various times t,

c(z,t):= Sum(A[n]*Phi[n](z)*exp(-lambda[n]*t), n = 1 .. 10)

I several peaks from emission spectra which I am trying to fit wit a Gaussian distribution. 

y = y_0 + A*exp[-{(x-x_0)/(width)}^2

 

The problem I am running into is I am getting fits which are wrong.  Maple returns:

fit_658 := 1.+1.*exp(.50000000000000*(z-1.)^2)

The correct answer is:

-7e05+2.7e06*exp(((z-656.1)/9)^2)

Also, I am interested in finding the deviation in the parameters which are found.

John Fredsted posted some interesting code dealing with permutations, and I suggested a small improvement.  Here, I want to continue the story of that improvement.  First, let us focus one particular line of code:

  posMaps,negMaps := seq(map((perm::list) ->
		(x::list) -> [seq(op(perm[i],x),i=1..nops(perm))]
	,perms),perms in [posPerms,negPerms]);

which uses a lexically scoped procedure to perform the permutations. The first thing to notice is that op(perm[i],x) is really equivalent to x[perm[i]]. Now that we have that perky op gone, we see that the resulting code expression will return unevaluated if x is unknown, unlike op which throws an error message (correctly so!). So now instead of using scoping, we can let Maple actually evaluate the inner perm[i] calls, and use unapply to recover a routine. Putting that together gives us my suggestion:

posMaps,negMaps := seq(map((perm::list) -> unapply([seq(x[perm[i]],i=1..nops(perm))],x),perms), 
perms in [posPerms,negPerms]);

I would like to do something like a derivative with respect to a vector or really anything involving a vector (not of a known length or known values) going in and a vector coming out:

 

diff( Transpose(x) * A * x, x)

Is this possible?

 

It's just that it is very different if you do x*(x+1) if x is a vector or if x is a scalar.  Does this make sense?
 

Any tips would be great!

Thanks,

Dave

Hello,

 

I have another question. I would like to construct a code, demonstrating the loss of information when sending codewords.  Usually, one assumes that each entry of the codeword has a chance equal to p  (like p=0.17) of being incorrectly sent.  How can I have such a random element in my code?  

 

Thank you,

fredbel6

 

I have a 2D and a 3D plot which are close together and I would like them to have a similar look. However, when I set the caption with:

caption=["whatever text I want here", font=[HELVETICA,BOLD,12]]

I get what appears to be different fonts on the two plots.

Any suggestions as to whether I am doing something wrong please?

(And does Maple not allow me to use any font I want?)

Many thanks

Karina

I downloaded John Fredsted's Gravitation code from the Maple application center, and now I'm trying to get it to be a package.

However, I'm having trouble doing this.

Can anyone help me get to the point where I can access this application as any other manufacturer produced package using the with command ?

 

v/r,

Hey

I was discusing Maple and Matlab with one of my friend.

He said that in Matlab he can do

a:=1:12

b:=sin(a)

plot(a,b)

that's easy in matlab to do so

i use

> ptlist:=NULL:
> for n to 12 do
> ptlist:=ptlist,[n,sin(n)]:
> od:
> plot([ptlist]);

do to so

 

is there any easy way to do that in maple?

like creat a sequence from 1 to 12? ( besides seq(n,n=1..12))

 

thanks

 

 

dsolve( {diff(x(t),t)=sqrt(x(t)), x(0)=0}, x(t));

use the theorem to test the ODE ,the solutions are unique

however maple gives me a unique solution?

 

 

Hello, I would like to create paragraphs and titles shown in black, inserted in my maple worksheet ( I use maple 10), should I change the standard mode?