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Polynomial min/max using coefficients vector?

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Steve
Steve 2011-10-12
Hello Experts,
Consider I have polynomial and a vector p with it's coefficients. What function in Matlab gets such vector p and computes max and minimum.
Thanks a lot in advance!
I need both maximum and minimum.

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Thomas
Thomas 2011-10-12
Suppose you have a polynomial
x^3 - 2*x - 5
c=sym2poly(x^3 - 2*x - 5) will give you the vector coefficients:
c =
1.00 0 -2.00 -5.00
minmax(sym2poly(x^3 - 2*x - 5))
ans =
-5.00 1.00
minmax(sym2poly(polynomial)) will give you the minimum and maximum of the coeffiecients.
you can also use 'minmax' on vectors: http://www.mathworks.com/help/toolbox/nnet/ref/minmax.html
Hope this was useful
  2 个评论
Steve
Steve 2011-10-12
Thank you very much!!!!
It was my pleasure to get your answer, informative and smart!
Steve
Steve 2011-10-12
I meant the extremum...sorry but maybe you didn't expressed myself right.

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