Hello,

this is the first time I am using the command line for Maple.I have a few questions,

1. How do I change my current directory?

I tried with currentdir() but with no success.If my dir is E:\Work ,how do I change it?

2. How to execute a *.mpl?

I tried cmaple.exe <*.mpl> but again no success.

 

I am using Maple13 by the way.

 

Any help is golden.

 

Best regards

I have a big list in Maple named A with 324 elements. I want to change one of the elements of that. For Example  I want to say

A[274]:=xi=xj;But I receive error which says:Error, assigning to a long list, please use Arrays.

How do I create a multiplication table for congruence classes? For example, I want to multiply x+x+1 by x+1 in Z₂[x]/(x+x+1)

Hello,

I found this on a website:

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

To clear all variables in Maple and restart without having to reload the application, enter:

restart;

This will clear all values, unload all packages, and reinitialize Maple. However, this command will not free up memory previously allocated to Maple; consequently, when doing large jobs, the only way to improve speed is to exit and restart Maple.

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

Does this mean I can't clear any variables from memory at all without closing Maple?

In Matlab all you have to do is:

and that will clear the variable x from memory (you can see that the amount of memory allocated to Matlab goes down if you look at the windows task manager)

 

In Maple when I clear the variable x by applying the command:

the amount of memory allocated to maple remains the same.

 

I'm hoping that that website was wrong and there is a way around this because being able to clear a huge variable that's only needed for the initial stages of a long computation is extremely important - any software should be able to do this.

Hi. I recently turned over to maple 13, after using TI InterActive! for 2 years. But i am having som problems working with vector functions in maple. Here is a link to the PDF file with the exercise in TI: https://docs.google.com/fileview?id=0Bx5y79IuSOVJNTAxNmJmODAtOGY3OC00NWRhLWI0ZTgtMzBmOWJhMzYzMDMw&hl=en It's when i reach "Opgave 2d" that i get into trouble.. when i differentiate the r(t) function it just gives me an error.. "non-algebraic expressions cannot be differentiated" And im just wondering wether there are other functions in maple to differentiate vector functions?

Dear All :

  I have a ODE equation system like this:

eqns := 1.00011000*10^(-7)*(diff(v[gs](t), t))-1.000*10^(-12)*(diff(v[ds](t), t))+v[gs](t)+1.000*10^(-18)*(diff(v[gs](t), t, t))+5.00*10^(-19)*(diff(v[ds](t), t, t)) = 12, 2.900*10^(-18)*(diff(v[ds](t), t, t))+5.00*10^(-7)*(diff(v[gs](t), t))+6.00*10^(-19)*(diff(v[gs](t), t, t))+v[ds](t) = 24
 

ics := v[gs](0) = 3.5, v[ds](0) = `#msub(mi("V"),mo("in",fontweight = "bold"))`

Dear all,

I was wondering if there is any simple way in maple which could do the following:

given a polynomial (over the reals), return a list or set with all its (maybe monic) factors.

That's not exacly what the 'factor' command does.

 

As an example, given the polynomial (x+1)*(x+2)^2, I would like to get something like:

{1, x+1, x+2, (x+2)^2, (x+1)*(x+2), (x+1)*(x+2)^2}

 

Do you know if this is possible in a somewhat straightforward way?

 

Many thanks in advance for your time..

I have an array of 25 values and need to plot a graph with these values

Hi

I have some 3d plots with colors that I would like to export to a vector format such as eps or ps. At the end I will use it as a eps picture in a latex document so if it is possible to export directly to vectorized eps.

I have tried to used to export feature but this simply export it to something that look like a very hard compressed jpeg picture.

Does anyone know how to do this?

 

Thanks in advance

Regards Brian

hi, for example i have this equation:

View 11295_etagamma.mw on MapleNet or Download 11295_etagamma.mw
View file details

 

i need to factorise it so that i have all of the eta^2*g^2 terms together, can somebody pls show me.

 

thank you

 

Hello there.

I´m fairly new to maple, so i apologize if this is a rather "simple" question, but right now I don´t really know how to get rid of the error message that occurs.

What I try to do is define 3 components of (in this case) a function that describes a magnetic field. These functions ( seen below) depend on a few parameters (a,b,c,d,p and chi).

restart:
with(plots)

>
> PlotMfield := proc (a::float, b::float, c::float, d::float, p::float, chi::float)

I'm attempting to plot a Laguerre-Gaussian beam in Maple. I have u(r, theta, z)=f(r, theta, z). What do I need to do to it to make it plot properly? I've tried to equate it to something, but it claims it is not in parametric form. What does that even mean?

Hi

I am trying to plot E as a function of t for a following implicit integral equation:

(int(sqrt((1-(1-E^2)*(sin(x))^2)/(1-(1-E^2)*t^2*(sin(x))^2)),x=0..pi/2))=0

I am using implicitplot, but apparently it loops until infinity and not give any answer.

I tried also to change the integral boundaries to x=0.1..1.55 with no result.

 

I'll appreciate any help

 

Mark

PhD student, IIT

I've bought a new computer recently and was disappointed, because Maple uses only 25% of that processor (my old computer used 99% of CPU).

I have Intel Core i5 750 processor (it has 4 kernels).
From the Screenshot you can see that It uses only 25%, but not because it uses only one kernel (it uses all 4 kernels).

If I open two Maple instances and run the same program on all of them at once then I get 50% of CPU used.

The question is:
how to force to use Multi-Kernel processor to work at 90% (if needed) with one single Maple program?

It seems that this isn't a limitation to Maple, but for all other programs as well.
For example,

hi, maple wont solve this...

L=1:  seq([fsolve(cos(beta*L)cosh(beta*L)-1=0,beta)],n=1..6);

 

can anyone pls offer some insight into this.

 

Thanks