Hello all,

I've noticed that something has changed to the type of sqrt in Maple 15, which breaks backward compatibility...

In Maple 14, we have

> type(sqrt,procedure);          true
> type(sqrt,`module`);          false

> eval(sqrt);          proc(x::algebraic, f::identical(symbolic))  ...  end proc

while in Maple 15, we have

> type(sqrt,procedure);          false
> type(sqrt,`module`);          true

I copied a column of figures from Excel and pasted them into an Maple worksheet.  Maple displayed a column vector with the appropriate values.  I set the variable y equal to this vector and was able to verify that, for example, y[3] had the correct value.  However, when I tried to use y[i] after a summation symbol which used i as the index I got the error message "Error, bad index into vector".  The summation expression worked fine when I redefined y by the following:

The original question I posed was whether I could control the output format of a complex array in MathML. I will pose the more general question, how could I customize the MathML output (much like LaTeX output can be customized)?

Regards.

I'm putting together what will eventually be a rather large simulation system that I want to be able to maintain across a reasonably large organization. Do you have any recommendations for Source Code Control/Versioning systems that work with your .msim file format or should I resign our team to exporting/importing code back and forth into Modelica for source control?

Thanks.

When I try to solve a DAE system I got this error:

               Error, (in dsolve/numeric/DAE/applysub) numeric exception: division by zero

Any ideas?
Thanks everybody for help!

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§