Clear Filters
Clear Filters

Dividing two vectors of different sizes

1 view (last 30 days)
If you have two vectors a = [1 2 1]; b = [1 1] that represent polynomials can you divide a by b to get [1 1] as the answer, since (s^2+2s+1)/(s+1) = s+1? I know you can divide the vectors by first converting them to polynomials using poly2sym(a)/poly2sym(b) and then extract the coefficients but is there a simpler way?

Accepted Answer

Matt J
Matt J on 15 Mar 2021
Edited: Matt J on 15 Mar 2021
Yep. Just use deconv.
ans = 1×2
1 1
Aleem Andrew
Aleem Andrew on 15 Mar 2021
Can you divide vectors with deconv or a similar method if the numerator's degree is smaller than the denominator's? I get the incorrect answer 0 when I do so instead of the equivalent of (s+3)/(s^3+17s^2+14s+8).
numg=[1 3]; deng=[1 7 14 8];
Matt J
Matt J on 15 Mar 2021
What do you think the result should be?

Sign in to comment.

More Answers (0)


Find more on Polynomials in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!