` q=polyder(a)`

` [q,d]=polyder(a,b)`

Inputs | |

`a` |
A vector of the coefficients of a polynomial, which is the numerator in case two inputs are specified. |

`b` |
A vector of the coefficients of a polynomial, which, if specified, is the denominator. |

Outputs | |

`q` |
The vector of coefficients of the numerator of the ratio of polynomials which is the derivative of the ratio of the inputs. |

`d` |
The vector of coefficients of the denominator of the ratio of polynomials which is the derivative of the ratio of the inputs. |

>>polyder([2 3 4]) // derivative of 2x^2+3x+4 is 4x+34 3>>// The derivative of (2x^2+3x+4)/(2x^2+4x+1) is>>// (2x^2-12x-13)/(4x^4+16x^3+20x^2+8x+1)>>(q,d)=polyder([2 3 4],[2 4 1])>>q2 -12 -13>>d4 16 20 8 1