Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Change language to: English - Français - Português - 日本語 -

Справка Scilab >> Polynomials > derivat

# derivat

Rational matrix derivative

### Calling Sequence

`pd=derivat(p)`

### Arguments

p

polynomial or rational matrix

### Description

The derivat() function works with expressions like 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.

### 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)```

 Report an issue << denom Polynomials determ >>

 Scilab EnterprisesCopyright (c) 2011-2017 (Scilab Enterprises)Copyright (c) 1989-2012 (INRIA)Copyright (c) 1989-2007 (ENPC)with contributors Last updated:Fri Apr 11 14:19:38 CEST 2014