derivat

derivative of polynomials or of rationals

Syntax

pd = derivat(p)

Arguments

p, pd: arrays of polynomials or of rationals

Description

The derivat() function works with expressions like $p(z) = \sum \limits_{i = -\infty}^{\infty} A_{i} z^{i}$ which consists of functions of linear combinations with integer exponents of one variable (in the example denoted by z).

The function derivat() implements the analytical derivation of p(z), giving the following result. $\dfrac{d(p(z))}{d z} = \sum \limits_{i = -\infty}^{\infty} i A_{i} z^{i - 1}$

Examples

s = poly(0,'s');
derivat(1/s)  // -1/s^2;

p1 = poly([1 -2 1], 'x', 'coeff')
derivat(p1)

p2 = poly([1 -4 2], 'y', 'coeff')
derivat(p2)

p3 = poly(ones(1, 10), 'z', 'coeff')
derivat(p3)

p4 = poly([-1 1], 't', 'roots')
derivat(p4)

s = %s; p5 = s^(-1) + 2 + 3*s
derivat(p5)

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derivat

Syntax

Arguments

Description

Examples

See also