MaplePrimes Questions

I'm using the BoxPlot function and am trying to change the colour of two dates in the title="string" part, so they correspond with the colours of the two related box plots. Is there a way to do this?


I have tf=0.04s but the probe plot only 0.02s at one simulation, 0.03s for another simulation ! How to oblige the probe to plot from 0s to 0.04s ?


I have two parametric equations, one for x(t), one for y(t).  Both are ODEs of order 1.  Both are implicit.  There is no way to solve explicitly for dx/dt or dy/dt.  How can I get Maple to do a plot of the solution?  I tried DEplot but apparently it demands an explicit presentation of dx/dt and dy/dt.   I have Maple12 on a Mac, but could use Maple15 on a server.

Dear everyone,




  I have a simple problem of writting data into a file:


  For something like


for i from 1 to 3 do
end do;



I got


Just a small question: what's the difference between writing

product( (2*i-1) mod 3 + 1, i=1..10 )

which incorrectly gives 105411381075, and writing

mul( (2*i-1) mod 3 + 1, i=1..10 )

which correctly gives 432...

And what's the reasoning behind this?

-- Regards,


Hi everyone,
While I am getting more and more comfortable with the document mode, I have some questions regarding the document block feature:
- What is a document block good for anyway?
- Why not have the whole document in one block?
- Can one join two document blocks?
- when do I "remove the document block"
- How can I make sure that say an informational 2-D math expression inside a document block never gets executed?
-- Can I still...


I have a problem related to solving the complex equation of dispersion relation.

In the plots some modes are missed. I dont know whay?

Is possible to help me? (m0^2<0).

 local ce,c0,ve,va,cte,ct,me,m0,DT,n,EQ,i;
 ce:=6.2;c0:=0.25;ve:=5.25;ck:=1.06;ct:=0.243; cte:=2.515;

I write this code:

> e1 := a-3;
a - 3
> e2 := sqrt(6)*b+6;
6 b + 6
> trac := e1+e2;
a + 3 + 6 b
> dter := e1*e2;
/ (1/2) \
(a - 3) \6 b + 6/
> dell := trac^2-4*dter;

Hello, I'm just starting to work with maple I'm working on Enzyme kinetics project and I have no idea how to solve ODE system using GEAR'S or A-stability methods. I'm looking for help.


What is wrong?

> restart;
> Digits := 10;
> dsys := {diff(E(t), t) = -kf*E(t)*S(t)+kr*ES(t)+kcat*ES(t),

Hi, I'm trying to calculate a few integrations:




N1, N2, and N3 are 3x3 matrix are are functions of eta0, eta2. eta0 and eta2 are derived after several integration as well.

If i do not want to change the name "eta0" and "eta2", can i write something to indicate (eta0 for E1 is 8.3, eta0 for E2 is 4.5, eta0 for E3 is 7.9). I hope...


given a ploynomial in three variables x,y,z, I want to check if it is nonnegative for all (x,y,z) in R^3.

I know there is a function 'verify' in maple but it doesn't work with my polynomial, I think it's too complex.

Do you have any idea which other function I could try?


Thank you



Hi, i'm trying to change Matrix([[9,8,7],[6,5,4],[3,2,1]]) into Matrix([[1,2,3],[4,5,6],[7,8,9]]). I try to use FlipDimension, it works with two steps, but i cant seem to fit it into one step. Is there a simplier thing that i could do please? Thanks.


i've been using evalf(Pi*5.6) for my calculations. after a few steps of calculations, some of the values are as small as 7.4x10-9 . These small values are insignificant to my calculations. how should i ask maple to ignore all the positive and negative values that are smaller than 1x10-9?

Please advice. Thanks

there are four points :

O = (0, 0), P = (0, b/d), Q = (beta/delta, 0), R = ((-d*beta+b*gamma)/(-delta*d+gamma*c), (beta*c-delta*b)/(delta*d-gamma*c))

and then  define the jocbian maxtrix as

J=Matrix(2, 2, {(1, 1) = beta-2*delta*x-gamma*y, (1, 2) = -x*gamma, (2, 1) = -y*c, (2, 2) = b-2*d*y-c*x})

at last , i want to get the jocbian matrix at the four points,  so  must substitute the coordinate of the four point into the...

First 787 788 789 790 791 792 793 Last Page 789 of 1487