restart:with(MultiSeries):with(plots):

parvalues:={C=2.02,H_liq=8.74,R=22.11,R1=0.0006};

G:=R3*k*(1-R1)/(C*Pec_i);

F1:=1/(R*S+1-S);

F:=F1*(1-R*G*S);

F2:=Pec_i*F;

A1:=Theta0/C=(exp(F2*(1-S))-1)*(H_liq+1/(1-exp(-C/k*F2*(S))));

R3values:= [0,-1,-3,-4]; colours:= [red,blue,green,black]; display([seq(plottools[transform]( unapply([k, subs(parvalues, Pec_i = -20, R3=R3values[i], F2)], (k,S))) (implicitplot(subs(parvalues,Theta0=4,R3=R3values[i...

so...here it is that equation:

du/dt   = d²u/dr² +  du/r*dr  +  u  +  f(r,t);     r=(0,...,2]; t(0,...,1]

also we have conditions:

u(r,0)=0;

u(0,t)=t^2;

u(2,t)=0

I need to find u(r,t) and to graph it

r and t are cylindric coordinates.

f(r,t) is some definite function.

Hey all,

My question is better explained with an example

the algorithm I have here creates a matrix M[j] for each run of j.

I want to be able to export each of these matrices to a different spreadsheet and if possible, set up a naming critiria for each spreadsheet(so that I dont have to enter a name in the dialog box after each run)

Any suggestion will be really appreciated. Thanks

Lovinash

here's the example:

How can I create a vector using a step index, for example, using the function output f:=1/i+1 and alternate it with a zero

 that produces a vector such as,  0,1/2,0,1/3,0,1/4,0,1/5.....?

Every attempt I tried failed.

How can I manipulate the scale of dominion?

As you can observe with the graphic can not be examined.

Gracias

Hi everyone,

I have a 2nd order system which I want to solve. But the solver outputs no results after evaluation, just returns to the prompt. Do you know what I am doing wrong?

deq1:=diff(x[1](t),t$2)=k[1]/abs(x[2](t)-x[1](t))^2;
deq2:=diff(x[2](t),t$2)=k[2]/abs(x[2](t)-x[1](t))^2;
sys_ode:=deq1,deq2;
ICS:=x[1](0)=5, x[2](0)=10, D(x[1])(0)=0.1,D(x[2])(0)=0.2;
dsolve({sys_ode, ICS});

thanks.

Good morning.

I have a problem.

My Foco1 function is slower than Foco and how can i do it faster?, because that takes a long time.

26-05-2011-robot-man.mw

thank your for your answer

I want to search maple files for specific texts within the file.  What software will do this?

I recall some mention before about searching for specific texts in maple documents but I cannot find it. 

Hi there,

I got an output

and would like to bring it in the form

.

How do I do that? :)

In fact I don't even manage to collect the factor of 3*beta^2 as follows

Hello all,

I've noticed that something has changed to the type of sqrt in Maple 15, which breaks backward compatibility...

In Maple 14, we have

> type(sqrt,procedure);          true
> type(sqrt,`module`);          false

> eval(sqrt);          proc(x::algebraic, f::identical(symbolic))  ...  end proc

while in Maple 15, we have

> type(sqrt,procedure);          false
> type(sqrt,`module`);          true

I copied a column of figures from Excel and pasted them into an Maple worksheet.  Maple displayed a column vector with the appropriate values.  I set the variable y equal to this vector and was able to verify that, for example, y[3] had the correct value.  However, when I tried to use y[i] after a summation symbol which used i as the index I got the error message "Error, bad index into vector".  The summation expression worked fine when I redefined y by the following:

The original question I posed was whether I could control the output format of a complex array in MathML. I will pose the more general question, how could I customize the MathML output (much like LaTeX output can be customized)?

Regards.

I'm putting together what will eventually be a rather large simulation system that I want to be able to maintain across a reasonably large organization. Do you have any recommendations for Source Code Control/Versioning systems that work with your .msim file format or should I resign our team to exporting/importing code back and forth into Modelica for source control?

Thanks.

When I try to solve a DAE system I got this error:

               Error, (in dsolve/numeric/DAE/applysub) numeric exception: division by zero

Any ideas?
Thanks everybody for help!