Hello, I want to solve a DE in x(t) where the RHS of the equation is a random number that changes with time. For example: x''(t) + 10 x(t) = f(t) where f(1)=1, f(2)= 6, f(3)= -2...etc. I tried to use ran() but it solves it for a fixed random number, while I want it to be time dependent . Is there a way I can do that? Thanks

I have a set of points and I want to display them in animation joined sequentially by line segments.  What's wrong with the following code?   Maple 11 gives the message    "Error, unable to execute seq"

traj:= [2,1], [3,2],[4,3], [6,8],[3,-2]

animate( plot,  [   [seq( traj[ k ],  k=1..J )]   ]  ,  J=[ 2,3,4,5] )

 

 

in maple 11, can anyone give me the right commands in making a plot coords for a set of datas..... my data is about number population of 4 species per month... the independent variable is time/month, while the dependent variables are the 4 species which are frog, spiders, snakes, and beetles..... any help will be appreciated...

How can I derive the root diagram of the SU(2) group by using the Pauli Matrices?

thanks,

dc

What I have done wrong?

 

eq := [piecewise(p(t) < prec, p(t) = C1*exp(function), p(t) >= prec, p(t) = C1*exp(function))]

 

params := [C1 = .2, prec = 100]

sys := DynamicSystems[AlgEquation](eq, inputvariable = [function], outputvariable = [p(t)])

But I recieve the following error message:

Error, (in DynamicSystems:-AlgEquation) cannot match the arguments to an appropriate system

Hi,

I am being given the following question:

 

Let f(x) = tan(sin x2)−sin(tan x2). Let n be the smallest positive integer
such that f(^(n))(0) 6= 0. Then n = __.

I am suppose to differentiate f(x) using maple to solve for n, that is to differentiate the function over and over again till I am able to get say f(^(16))=0.

However, maple gets very laggy after i tried n=10.

Is there any shortcut that could help solve this problem?

Best regards,

zn.

 

 

Hi, I have the following memory problem with maple 12 on mac (intel) which (I guess) should be known already, so hopefully someone can give me a quick solution to it: I can not rise via kernelopts(datalimit=blabla...) the soft datalimit above 500 mb. ("Error, cannot raise the datalimit above the hard limit". ) This is quite weird, since I have for sure more physical memory available than that... The suggested solution for this problem according to the maplesoft FAQ (only for PPC !?!) is to edit a file named mserver_ulimit ... unfortunately this does not seem to help !

My data file is a list, where each line is

[elm1,elm2,elm3,elm4].

 

I would like to read through and calculate the mean of all of the elm1's.

I would like to get a distribution of the elm1 data.  For example, in 800 lines of data, if elm1 takes on values 5,6 and 7, I want to know that there are 300 5's 400 6's and 100 7's.

stats[mean](data) needs the numbers inputted.  I even thought I could pull off the elm1's into a separate list, but stats[mean] won't take a list.

Any help is appreciated.

Hi Everyone!

I want to export several Figures with Maple at the same time. I tried

with(plots):

for i from 1 to 5 do
interface(plotdevice=ps, plotoutput=`c:/test||i.eps`, plotoptions=`color,portrait,

od:

but it did not work. How can I create one file per Figure?

Thanks a lot,

Bernardo

 

If I try to solve the following differential equation with simbolic parameters:

IC := p(0) = condizIni

ode := diff(p(t), t) = (QIn-QOut-derV)/((1/Boil+1/Bwall+percair/(m*p(t)))*V)

func := rhs(dsolve({IC, ode}))

the result I get from Maple12 have the following member inside it:

LambertW(_Z7, _Z)

but I do not know what are _Z7 and _Z.

Where I can find the expression of these parameters?

Why Maple added these parameters?

I like the feature that permits the use of the dotted derivative, as it has the look and feel of the work that I am doing. However, when I enter, say, (x_dot + 1)^2 and invoke the expansion, I get x_dot(t)^2 +...

It's nice that Maple knows that x is a function of t, but I would like to avoid the clutter. How do I suppress the (t) so that all I see is x_dot^2?

I use Maple 11. Sometimes, the result become more then one when it run. Then the results are same. How to make it to give difference result?

Thanks.

 i have a project from my univercity an d i want to ask you how can i put maple into flash document so can you help cause i must give my project one month again thanx before

How can i avoid this error?

that happens 'cause I have 3 different solution for Vv:

> Vv3:=Re(solve(eq1,Vv)[3]);

 

The following program was created to determine a Hermite polynomial. Can anyone see where the error lies? Thanks!

 

restart; f:=x-> (x*(cos(x)))- ((x*x(sin(x/2))));
                 f := x -> x cos(x) - x x(sin(1/2 x))

                              fp := D(f)