<p>I running Maple 12. I don't see what could be wrong with the specified initial values for this nonlinear fit problem. Note error when initial vlaues are specified, and no error without initial values.

Hi,
when Maplesim derives the equations from an electrical circuit,  it renames components in a way that makes the equations bloated/unreadable. Simple example: a resistor R1 becomes `R1.R`, which is awkward for further use. Is there a global switch to change this ?

Hi, I'm really new to maple and I'm trying to learn how to do few basic things. I have sequential files 1740.tmp, 1741.tmp, .... 1770.tmp. and each file contains 12 float numbers: 0.400 0.324 0.232 . . . 0.342 what I've done so far is the following: L := [seq(i, i = 1740 .. 1770)] filename := cat("/Users/humadih/test/", L, ".tmp") > Y := readdata(filename, 1) and it's giving me this error: Error, (in readdata) expecting a file name or descriptor I can get rid of this error message if I put one file name like: > Y := readdata("/Users/name/test/1741.tmp", 1)

I am trying to solve a problem of liquid-liquid equilibrium based on the gibbs free energy equation:

DGdef := DG/RT = sum(n[i]*ln(phi[i]), i = 1 .. nc)+sum(sum(X[i, j]*n[i]*phi[j], j = i+1 .. nc), i = 1 .. nc)

DGdef1 := subs(n[i] = phi[i]*V/v[i], DGdef)

DG := eval(rhs(DGdef1), nc = 3)

Somebody named Alec have gave me this programme after he modified my old programme.

I am having trouble trying to perform some of the computations listed in the Maple Advanced Engineering Mathematics E-book.  I directly copy and paste the text into my worksheet but Maple does not compute the answer as shown in the e-book.  It simply rewrites what I copied in a different format.  For example I'll write:

simplify(CrossProduct('A' , 'E') ) ;

Instead of computing the answer it just rewrites my input in a differnent way like this:

=CrossProduct((cos(p)-psin(p),-2sin(p)-pcos(p))

Dear Experts,

I want to solve 2 workssheets with NPL Solve with Maple 12.

But how is it done? In worksheet 1 I always get this error. Unless I have solved this worksheet one err I can not continue wrking on worksheet two.

Thnaks for help

Walter

can someone please tell me why maple says that x=root(x^2+1)/x=.5root(2+root(2)) please someone help, or even better that why does arcsin(1/x)=arctan(x)=>x=-root(-2+root(20))/(-1+root(5))???????

Hi,

I want to solve the following inequation: solve( -a + sqrt(a^2 - 4*x) < 0, [x]) assuming a>0

the result from maple is: x < 0, (1/4) a^2 < x

which is wrong!

anybody can tell me why?

Thank you,

CN

Hi, I am defining a matrix this way: m := Matrix(2, 3): But I don't want zero value to be assigned by default to its elements, instead I want to have them as just m[i,j] and not zero. Please tell me how I can do that. Thanx,

Is it possible to print a hyperlink to the worksheet (programatically, not by clicking menu)? In Maple 13 worksheets are errors and warnings displayed as hyperlinks to web.

 

I have designed a Maplet that can load time series data from any selected csv file (data organized in columns) 

and plot such a time series with the help of a Dropdown list. I think such a functionality is something Maple is missing.

I would like to have a simple button in the Maple original meny where you can load such a maplet from.

However , the maplet still have some problems which I was wondering if someone could help me iron out :-)

I have attached the worksheet.

 

Hi, I want to construct a general 3 by 3 matrix, but its form is symmetric. How can I do that? As the result maple must consider a[1,2]=a[2,1] in calculations afterwards. Thank you,

Hello,

I wanted to use the Split command of StringTools package and I realized that it is different from the Split command in Visual Basic.

In VB one can give a third argument to define the maximum numbers of splittings:
For example : in Visual Basic returns the array . , i.e.the function splits the string at the first occurrence of the ":".

It would be useful the improve this command in Maple to have this possibility.

By unexpected, I mean unexpected to me, of course.

The following substitution fails:

> A := y*(f[x]-z)/(f(x)-y);

> subs({(f[x]-z)/(f(x)-y)=lambda},eval(A));

but if I replace the multiplication by an addition, the substitution works:

> B := y+(f[x]-z)/(f(x)-y);
> subs({(f[x]-z)/(f(x)-y)=lambda},eval(B));

Or if I simplify the expression, the substitution also works:

> C := y*(f[x]-z);
> subs({(f[x]-z)=lambda},eval(C));

How come? Is there a way to make the substitution sought into A?