R: Summary of a Polynomial

summary.polynomial {polynom} | R Documentation

## Summary of a Polynomial

### Description

Summarize a polynomial by describing its “key” points.

### Usage

    ## S3 method for class 'polynomial'
    summary(object, ...)

### Arguments

`object` | an object of class `"polynomial"`.
`...` | Not used by this method.

### Details

This is a method for the generic function `summary`.

### Value

A list of class `"summary.polynomial"` (which has its own `print` method) containing information on zeros, stationary and inflexion points.

### Examples

    p <- polynomial(6:1)
    p
    ## 6 + 5*x + 4*x^2 + 3*x^3 + 2*x^4 + x^5
    pz <- summary(p)
    pz
    ## [1] -1.49180+0.0000i -0.80579-1.2229i -0.80579+1.2229i
    ## [4]  0.55169-1.2533i  0.55169+1.2533i
    ## To retrieve the original polynomial from the zeros:
    poly.calc(pz)
    ## Warning: imaginary parts discarded in coercion
    ## 6 + 5*x + 4*x^2 + 3*x^3 + 2*x^4 + x^5

[Package polynom version 1.3-9 Index]