How to do polynomial differentiation

3 views (last 30 days)
How to do polynomial differentiation without using known matlab commands
  2 Comments
Guillaume
Guillaume on 28 Mar 2018
Why wouldn't you want to use known matlab commands. And for that matter, what are unknown matlab commands then?
Raiven Balderas
Raiven Balderas on 28 Mar 2018
see below accepted answer :)

Sign in to comment.

Accepted Answer

Roger Stafford
Roger Stafford on 28 Mar 2018
Let P be the usual Matlab row vector of coefficients of a polynomial. Then, (as we all learned in calculus,) the corresponding vector of coefficients of the polynomial's derivative, dP, is:
n = length(P);
dP = (n-1:-1:1).*P(1:n-1);
  1 Comment
Raiven Balderas
Raiven Balderas on 28 Mar 2018
Thanks ! I love math and have taken up to calculus 3 , but for some reason me and coding matlab do not mix. thank you very much . great answer

Sign in to comment.

More Answers (1)

Walter Roberson
Walter Roberson on 28 Mar 2018
Multiply each location in the coefficient vector by the degree it corresponds to, and get rid of the location corresponding to degree 0. You can probably build the degree list using the ":" operator.

Categories

Find more on Elementary Math in Help Center and File Exchange

Tags

Community Treasure Hunt

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

Start Hunting!