casperyc

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17 years, 157 days
University of Kent
Dr

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These are questions asked by casperyc

hey,

can someone give me an example of plotting a phase plane without solving the ODE

 

suppose i got an equation

diff(x(t),t$2)+x(t)=0

without solving it

 

plot a phase plane (  x dot, x )

 

thanks in advance

Hi,

Basically , I was doing some calculation algebracly.

I got some out like " arc(    AAAAAA  , BBBBBB) , arc( CCCCC,  DDDDDDD) "

 

I wonder what the comma between  A ns B mean?

 

meaning arc (AAAAA) and acr (BBBB)??

 

dose that mean I have 4 answer?

 

 

+++++++++++++++++++

I was solving some sin,cos function

I can find the numerical values of the answer

Hey

I was discusing Maple and Matlab with one of my friend.

He said that in Matlab he can do

a:=1:12

b:=sin(a)

plot(a,b)

that's easy in matlab to do so

i use

> ptlist:=NULL:
> for n to 12 do
> ptlist:=ptlist,[n,sin(n)]:
> od:
> plot([ptlist]);

do to so

 

is there any easy way to do that in maple?

like creat a sequence from 1 to 12? ( besides seq(n,n=1..12))

 

thanks

 

 

dsolve( {diff(x(t),t)=sqrt(x(t)), x(0)=0}, x(t));

use the theorem to test the ODE ,the solutions are unique

however maple gives me a unique solution?

 

 

suppose i have an ODE dx/dt=x/t how do i draw isoclines? thanks
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