"Equate - convert a pair of rectangular objects into a list of equations" How can I do the opposite? e.g. converting [a=2, b=4, c=3] into [2,4,3]

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

Large or involved projects may involve Maple modules which rely upon each other. Routines in one module may call routines in another module. Interdependence of modules can have a direct bearing on the available means of successfully utilizing the `use` functionality. In certain situations, some of the ways to utilize the `use` statement can be problematic.

Some such situations, and workarounds, are illustrated below.

The basic description of the `use` statement functionality is,

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...

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?

If x -1 is regarded as the difference of two cubes, can Maple factor it?

Alla

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.

 

The attached work sheet teaches you the fundamental concepts behind the antiderivative.

The examples in this worksheet are entirely done in an interactive video tutorial - follow the link below:

 (Ctrl+Click on the link to view the video)

Antiderivatives - Video Tutorial

 

Enjoy!