The Math Forum

Search All of the Math Forum:

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

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

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Roots in negative/positive plane
Replies: 3   Last Post: Dec 18, 2013 2:22 PM

Advanced Search

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

Posts: 14
Registered: 12/18/13
Roots in negative/positive plane
Posted: Dec 18, 2013 1:44 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I have a polynomial and i want to know how many roots are in negative or positive plane. (ns = number of roots in negative plan; nd = number of roots in positive plane). For example:

p=[1 5 8 1 5];
ans =

-2.6171 + 1.3412i
-2.6171 - 1.3412i
0.1171 + 0.7513i
0.1171 - 0.7513i


The plot show that i have 2 roots in negative plane and 2 roots in positive plane. Thank you!

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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.