Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Logistic equation with delay
Replies: 8   Last Post: Mar 24, 2014 3:42 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 1,627
Registered: 11/8/10
Re: Logistic equation with delay
Posted: Mar 24, 2014 3:42 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"Adin" wrote in message <lgi88s$etr$1@newscl01ah.mathworks.com>...
> This is what I have so far:
> N1=zeros(201,1);
> t=zeros(201,1);
> t(1)=0;
> N1(1)=10;
> N1(2)=20;
> delta = 1;
> h=1;
> for i=2:200
> t(i)=i-1;
> d=(delta * t(i-1));
> N1(i+1) = N1(i) + h*N1(i)*(a-b*N1(i-d));
> end
> plot(t,N1(:,1)), grid on;
> But I'm getting weird plots like this: http://i.imgur.com/4NeseF6.png
> Any ideas what I'm doing wrong?

delta = 1;
for i=2:200

But - as I told you - this is the discrete form of the delayed logistic equation, not the continuous form.

Best wishes

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2015. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.