y = polyval(p,x) returns the value of a polynomial of degree n evaluated at x. 返回的是一个n阶多项式阶付给x的值?????
The input argument p is a vector of length n+1 whose elements are the coefficients in descending powers of the polynomial to be evaluated.
一个多项式p = s^2 ,另一个为x = 1,polyval(p,x)是什么呢? |
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