Dear my friends,

Recently I've written a program using Maple 13. During the program RUN following Attention appears:

-------------------------------------------------------------------------------------------------------------------------------------------

Parts of the expression are ambiguous. Please select one of the suggested meanings:

select a meaning for the expression:

function definition

remember table assignment

I have some expressions like the follwoing:

k := n*(phi+ln(-1/(-exp(phi)+exp(phi)*p-p)))/phi;

Moreover for some groups of expressions, I have a definition for mu and (sigma)^(2).

E.g.:

mu = n*p

(sigma)^(2) = n*p*(1-p)

Can I install Maple 14 and still use Maple 10 which is already installed?

In the list of how irrational, rational, and from small to large integers to sort.Can not calculate irrational. Can you help? Thanks

hello every body

  i wrote this code:

restart;

with(MmaTranslator[Mma]):
with(Student[NumericalAnalysis]):
with(DEtools, FunctionDecomposition):
with(linalg):with(ArrayTools):
with(LinearAlgebra):

n:=3 ;

  a:=(r)->q[r](t):
  x[1]:=Vector[row](n,a); 

Hello I'm new here and I need some help from you guys

I try to create a simple maplets to find the solution for ODE problems (first order only) But I keep getting the error message that saying
"expecting an ODE or a set or list of ODE's. Received ___"

here's mine:

Hello.

I know that I can use Maple to fit a curve on  data points (Fit command).
However, I'd like to plot (1sig, 2sig, 3sig) confidence contours for the fit parameters.
Is there any way how to do this in Maple 12?

Thanks.

I just wonder what you guys thing about the direct search optimization package
written by Dr. Sergey Moiseev which is available at the Application center

www.maplesoft.com/applications/view.aspx

Can it be used as a substitute for the global optimization toolbox ? 
 

If I have a sequence of points occurring at specific times.  How can I plot them on a graph so that they appear at a relative time scale? 

Let's take 4 points as an example. 

a:=[ [3,2,11:15] , [4,5,11:17] , [6,3,11:25] , [7,9,11:49] ]

How would I get these points displayed insequence at their relative times?

I have a program (its content is not essential, but I inserted it. The values in outer loops were changed to have only one set of initial data).

printlevel := 5;

for a from .5 by .5 to .5 do

for m from -.999 by .4995 to -.999 do

for n from -5 by 5 to -5 do

ODE := diff(diff(x(t), t), t)+.2*(diff(x(t), t))-x(t) = a*sin(t); k[1] := 0;

ics[1] := x(k[1]) = m, (D(x))(k[1]) = n;

for i to 30 do

X[i] := dsolve({ODE, ics[i]});

u[i] := rhs(X[i]);

Seems that I don't know how to organize a nested loop.

Simple example:

for i by 2 to 19 do

for k from 2 to 26 do

A := i*k

end do

end do

Nothing is returned here (when I expected a list of different values for A).

___________________

Hi everybody,

I want to plot a function f(x,y). I know I can do this with plot3d(f(x,y),x=-1..1,y=-1..1) and this works. But now I want to do something else: x and y fulfill g(x,y)=0 and I want to create a new function h(x) that is basically the old function f(x,y) except that for each x he has to take the y so that g(x,y)=0. Then I can do plot(h(x),x=-1..1). 

OK, this is easy if g(x,y)=0 can be solved for y. But life ain't simple ;-) and in my example this is impossible. I hope anybody has an idea?

Regards,

Casaubon

I have a parameter r which is between a and R, a less then r, r less then R - real or complex numbers, whatever, I need to integrate following function:

1/4*Pi*int(dr1/|r-r1|*int(dr2/|r-r2|*int(dr3/|r-r3|,r3=a..R),r2=a..R),r1=a..R);

The problem is that Maple always says, that it's unable to determine if r is between a and R, how can I assign r into this interval?

[note: Axel Vogt, 20 May: formatted the posting, such that it is readable]

Not sure whether this is more efficient, it is probably negligible and not worth the trouble.  However, ...

We can have Maple load packages when it starts by modifying the .ini file and we can load commands in their packages using the short forms Statistics[Mean] or Statistics:-Mean however if we want to keep using the short form of that command we need to always specify the main package it's.  I was just wondering if there was a way to load only parts of a package so that we wouldn't need to make calls to the main package all the time.