MaplePrimes Questions

SADE is a package used for symmetry analysis of differential equations. I downloaded the package from the link http://cpc.cs.qub.ac.uk/authorIndex/AUTHOR_F.html. But unfortunately, I even couldn't execute the examples given by the authors of the SADE. Please inform be about installing the package in Maple 14.

So, I've defined procedures in a .mw file and now I want to somehow read this file into another worksheet, in order use the aforementioned procedures. Is this doable? I've unsuccessfully tried using the READ command. The error messages I get are :

Error, on line 1, syntax error, character `?` unexpected:

<?xml version="1.0" encoding="UTF-8"?>

Error, while reading ``file.mw``

 

Not sure where to go from here. Any help would be great!

Hi,

I am trying to graph some curve C and the vectors from the vector field corresponding to t=1 and t=-1.

My Vector Field is defined by some F(x,y,z) and my Curve is some r(t) [didn't bother putting the actual values here since I only want a general expression...]

In other words I want to have some kind of a curve in 3D with vectors coming out at points t=+/-1 along the curve itself. Is there any way to do such thing?

Thanks!

If one types

seq(cos((n mod 3)*Pi,n=2..13);

Maple returns, correctly,

1,1,-1,1,1,-1,1,1,-1,1,1,-1

If one types

sum(cos((n mod 3)*Pi),n=2..13);  # surely the sum of the above sequence = 4

Maple returns, incorrectly, the value 1.

Sure enough, if one types

sum(cos((n mod 3)*Pi)*exp(n),n=2..13); # expecting the sum of e^n with every third term negative

Maple returns

e^2-e^3+e^4-e^5+e^6-e^7+e^8-e^9+e^10-e11+e^12-e^13  ...

How do I plot a Matrix's columns independently in a same display[plot].

A=Matrix(m,n)

plot(Column(A,1),Column(A,2),..,Column(A,n))

Gracias

Hi,

I would like the title of my y axis to say "SaO2 (%)".  When I put in "SaO[2] (%)" the output is SaO[2] (%); However, when I put in SaO[2] (%) the output is "SaO2 PLOT (...) "  How can I get both parts correct (i.e., the subscript of the 2 and the displaying of the percent sign)?

 

Thanks!


hello i  hope if you can help me.

 i have a problem solving this recurrence relation and how to insert if statemen (about  with for loop

and using the series and the solution should be

1-2y(2)-6y(3)-14y(4)=0

y(2)-y(3)-11y(4)=0;

-y(2)+3y(3)+8y(4)=0;

I need to plot solid sqaures and include the figure in a paper.

The plotdevices jpg and ps do NOT support this. Is there a special way to put solid symbols in these? What plot devices support solid symbols?

Hi, Im trying to show the first few energy levels of a particle in a 1-D box. The plots are looking how i want them to look, but i can't stop it from producing loads of unwanted code. It seems to have been produced from P1 and P2 and putting a colon after them doesn't supress the output.

Can anyone see how i can stop the blue code from being shown and keep the plots?

I just copied this from the Maple 14 documentation

f := proc( { [color,colour]::symbol := RED } )
    sprintf("color=%a   colour=%a", color, colour)
end proc;

to get

"Error, invalid procedure parameters"

Anyone any ideas? It's the same in Maple 12 and 13.

Hello again!

I am writing a procedure of which the body is done, I "only" need to take care of the input in a clever way, which is where I'm stuck. I want to make it as simple as possible for the end user. The procedure has the following parameters:

- 2 matrices of type 'Matrix' [required], say A and B

- either a list L (default []) or a symbol S (but one of them is required)

- an optional symbol v::symbol:=t

What's the best way of handling these?

Let's say I have a summation:

sum(a[n]*x^(n-2)*(n-1)*n, n = 0 .. infinity)

Is there a way to extract the expression being summed?

a[n]*x^(n-2)*(n-1)*n

I've experimented with patmatch, but haven't been able to make it work.

Hello!

When i start the simulation of my model, which is a rotor-stator interaction, i get an error message where the rotor first touches the stator: "Simulation problem: maximum number of event iterations reached (100) at t= ....". I made a custom component to handle the contact event (change of the derivatives), but i don't know where i can change the maximum iteration to a higher number.

Thank you.

Hi, just a quick one...

Is there anyway to put FPS into the options of an animation so when the MAPLE file is re-opened it is not reset to 10 as this is faster then I would like!!

 

Cheers

Dear Maple users

I know how to create an animation of a sine curve moving over time (t) on an x-axis to simulate a moving wave. In the help menu under the topic plots,animation it is explained how to animate a ball moving along some curve. How do I combine those two animations into one? The ball is moving along a curve completely different from the sine curve!

Regards, Erik

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