Can someone explain to me how I flush the memory build up that occurs as Maple keeps track of historical execution?

If I, for example, write a FOR loop that iterates a huge amount of times and don't include the colon after "end do", but rather use the semicolon, the memory usage keeps creeping up and then finally Maple just goes off into never land and never comes back.

I tried this in Windows and Mac OS X.  Same results.

I thought I could add an interface(historysize=?...

Hello all

I have a worksheet where I solve numerically a system of differential equations and define a lot of quantities based on the solution. Since I have to plot alot of stuff and make a lot of fits, the worsheet got cluttered and it's not so easy to find what I want anymore (besides, just running the entire thing takes A LONG time). So my question is, can I save the solution and the quantities I defined and use it as a "kernel" for other worksheets, so I can have...

Hi,

can anyone help me in solving the following PDE:

restart:

with(PDEtools):

> PDE := M1(x1, x2)*(diff(M1(x1, x2), x1))+(diff(M1(x1, x2), x2))*M2(x1, x2)*(1+x1^2)-2*x1*M2(x1, x2) = 0;

thank you,

regards,

Mutaz

testeq() gives inconsistent results. See this example:

Equation (1):

computes to

Equation

hey guys , my concern is about boundaries in random matrix or rtable. so, i can garantee that boundaries in  matrices are in 0 and 10, but i can´t impose a restriction  like the sum of row must be equal 10 for example.
help !! 

pop:=(10-0)*ArrayTools:-RandomArray(proc(A)
local i
if A::rtable[row] then 
seq(A(i),i=1..NumElems(A));
else
args
end if 
end proc(10,3))+0; 

Hello!

Maple 16 differs from Maple 15  (Linux, 64 bit )  in that the plots (both 2D and 3D) have all lines contoured in black.  

How to disable such new behaviour?

Hello,

I need help on plotting in for loop.

for M from 1.1 by .2 to 1.7 do 
for F from -3 to 3 by 0.1 do F2[F]:=dsolve(d1, numeric,output=listprocedure):  end do:
for F from -3 to 3 by 0.1 do 
P2[F]:=subs(F2[F],P1);
P3[F]:=evalf(Int(P2[F],0..1)); 
end do:
IQ:=Vector([seq(F,F=-3..3,0.1)]):
DT:=Vector([seq(P3[F],F=-3..3,0.1)]):
plot(IQ,DT);
end do;

The above code gives me 4 separate plots, but I want them all in just one plot.

How to solve this inequality? 6/(2*x+1)>(1+log[2](2+x)/x). I tried

solve(6/(2*x+1)>(1+log[2](2+x)/x),x);

I receive: "Warning, solutions may have been lost."

Sorry, I understand that my question sounds crazy, but that's what happened:

  I had a working Maple program  and Maple 15 installation on Ubuntu 11.10 64 bit

After I updated to Ubuntu 12.04 ,  Maple 15  starts, but returns almost all (except most primitive)  integrals unevaluated.

My old working worksheets not return all integrals unevaluated. 

Same with Maple 14. 

I have no idea what could have happened...

Hello,

1-I have one calculation and the result is "Error, (in expand/bigprod) object too large"... What can I do with this error?

thamks alot.

Hello,

1-I have one calculation and the result is "Length of output exceeds limit of 1000000"... What can I do with this error?

2-I have one calculation and the result is "Error, (in expand/bigprod) object too large"... What can I do with this error?

here is my code i want to run the loop for every value if there is invalid input in lhs(ans(1)) the loop should not stop and check for next value

> restart;
> 
> f1 := proc (x) options operator, arrow; R*T*(x*ln(x)+(1-x)*ln(1-x))+Omega[l]*x*(1-x) end proc;
x -> R T (x ln(x) + (1 - x) ln(1 - x)) + Omega[l] x (1 - x)
> 
> g1 := proc (x) options operator, arrow; (1-x)*SfA*(T-TfA)+x*SfB*(T-TfB)+R*T*(x*ln(x)+(1-x)*ln(1-x))+Omega[s]*x*(1-x) end proc;

hi

thanks for your responding, but i need the analtical solution not numerical . could u solve it again

diff(x₁(t),t)+x₁(t)+0.03x₂(t)+0.01y₁(t)+0.02499y₂(t)+.009y₃(t)=0

diff(x₂(t),t)+0.833x₁(t)+0.69985x₂(t)+0.13745x₃(t)+0.02499y₁(t)+0.06245y₂(t)+.00227159y₃(t)=0

diff(x₃(t),t)+0.109073x

Hey,

I have linearized the following system and I want to extract the linear matrices (a,b,c,d) form the solution. The program is as follows:

Hey,

I am trying to linearize a Statespace and extract the linear matrices from the solution. Using following example, can you explain how to extract the matrices a,b,c,d.