Hi to all

I am trying to merge two functions into a single graph. I have discovered the "piecewise" function but however I want to be able to manipulate the variables in both functions and plot a 3D graph to determine the results.

this is what I have so far

Z := proc (t)

if subs(p = 25, (100-p)*(1-exp((-1)*.11*t))/(10.00000000*exp((-1)*.11*t)+1)) < CM and 0 < t then subs(p = 25, (100-p)*(1-exp((-1)*.11*t))/(10.00000000*exp((-1)*.11*t)+1))

of the implicit function 8*x^3+y^3-6*x*y-3=0 with Maple?

How can I save a webpage as a text file? Not the source code. When I save a webpage from I.E. as a text file it seems to strip out a lot of the source code and I end up with a simple text file. Take this wikipedia webpage as an example http://en.wikipedia.org/wiki/List_of_HTTP_headers Now if I use Maple it grabs everything on the page, source code included which I do not want. Is there an easy way or must I create some code in maple (http surgery so to speak) to strip out the excess?

Hi

Im new to programming in maple and need some help.

I have this function, lets say it is f= x² and i have a constant called c (lets say it is 2 for now)

I use the command subs, but this could be wrong.

i write :

subs(x=c,f)

The output the becomes 4, when i would like i to be 2² . Put in other words, how can I get maple NOT to calculate the result?

Thanks.

I am trying to use second quatized operators in the Maple Physics package.  These operators obey the commutation relations:

[psiA(x1),psiB(x2)] = Dirac(x1-x2) and [psiA(x1),psiC(x2)] = 0 for example.  The commutator therefore depends on the arguments of the operators.

Using:

> with(Physics);

> Setup(quantumoperators = {psiA,psiB,psiC},algebrarules={%Commutator(psiA(w),psiB(v)) = Dirac(w-v),%Commutator(psiA(w),psiC(v))=0})

I'm new to Maple and find some aspects of the syntax and UI confusing.  The manual isn't much help.  In the case of "e"...

1) If I type in:    evalf(e^1,10) by just typing the letter e from the keyboard, I get back the letter e.  But if I go into the palette and select the expression e^a, and put it in evalf that way (for a=1) I get back a numerical value for e.  I can see that one of these e's is italicized and one isn't...???

Hi

I have been using the pdesolve command to solve the heat conduction equation in an infinitely long cylinder, but now I need to incorporate the convection that occurs at the end surfaces, in the case of a short cylinder.

The following is the code I have been using:

>> PDE := diff(Theta(r, t), r, r)+(diff(Theta(r, t), r))/r = (diff(Theta(r, t), t))/alpha;

>> pdsolve(PDE);

I have tried to add...

Hi

The problem is, as said, how can i get a "math output" when having something typed into my package.. 

An example of this could be:

printf("\Your function is: x^2");

When typing it like this my output becomes x^2, I would like it to become x² , how can I fix this?

- Slangers

how can i draw a polygon with labeled vertex by numbers which are inside of that polygon§

I have Maple 15.

I used one of the "Assistants" to solve a problem.

It offered me the command line code that would have solved the problem without the Assistant.

I saved that code to a file, and later tried to paste it into a new Worksheet.

It won't execute.  I can't convert it to anything that executes.

I assume Maple is viewing it as text, and not something that is executable.

sol1 := dsolve([diff(x(t),t) = y(t), diff(y(t),t) = -x(t), x(0) = 0, y(0) = 1...

L include kinetic energy

when F = diff( diff( L, dx), t) - diff(L,x)

i need to diff L with respect to dx, however, there is no dx in maple, how to do above equations?

with(DifferentialGeometry):
DGsetup([x],M):
ExteriorDerivative(x^2);

invalid frame: DGframe_data[0][1][2]

how to diff x^2 to get 2*x*dx with above command?

How come that I don't have a Maple Questioner Badge? 2886 people question Maple and I trust it unquestionably?

Even adiban who didn't post anything on this site, has it (as well as 10 other badges and a reputation of 1000).

I have a Pupil badge, which I couldn't get without asking a question - so I've asked at least 1 question.

Let's see if I get it after asking this question.

Alec

1.at parse(sprintf("%.3f",subs(x=1, pdf))); it error said number expected for floating point format

i need to copy the whole formula to pdf := something then it can calculate

2. also it can not plot

%%%% copyright by Martin Lee 2011%%%%%%%

l := [12, 14, 27, 35, 46, 49];
sl := gfun[listtoseries](l, x, egf);
g := convert(sl, ratpoly);
g := g - subs(x=0, g);
g := g/subs(x=1, g);
parse(sprintf("%.3f",subs(x=1, g)));
parse(sprintf("%.3f",subs(x=0.9, g)));

How to reserve dx when diff a formula

when i diff x^2 , need to be 2*x*dx but it only 2*x

How to reserve dx?