R: Summary, coefficient and prediction methos for polynomial...

summary.polynom {PolynomF} | R Documentation

## Summary, coefficient and prediction methos for polynomial objects.

### Description

These function implement methods for `summary`, `coef`, and `predict` generic funcitons for `polynom` and `polylist` objects.

### Usage

    ## S3 method for class 'polynom'
    summary(object, ...)
    ## S3 method for class 'polynom'
    summary(object, ...)
    ## S3 method for class 'summary.polynom'
    print(x, ...)
    ## S3 method for class 'polynom'
    coef(object, ...)
    ## S3 method for class 'polylist'
    coef(object, ...)
    ## S3 method for class 'polynom'
    predict(object, newdata, ...)
    ## S3 method for class 'polylist'
    predict(object, newdata, ...)

### Arguments

`object` | An object of class `polynom` or `polylist`.
`x` | A `summary.polynom` object to be printed.
`newdata` | A `numeric` or `polynom` object.
`...` | Not currently used.

### Details

The summary method for `polynom` objects provides information on the zeros, stationary points and points of inflexion for the object. For `polylist` objects this information is provided for each polynomial in the list. The result is a list.

### Value

For `summary.polynom` and `summary.polylist` a list of numeric vectors.

For `predict.polynom` and `predict.polylist` an object of the same class as the input argument: either numeric or `polynom`.

For `coef.polynom` and `coef.polylist` a numeric vector or matrix, or a list of numeric vectors.

### Author(s)

Bill Venables

### References

None.

### Examples

    x <- polynom()
    L <- polylist(1, 1-x)
    for(j in 2:10)
      L[[j+1]] <- (2*j - 1 - x)*L[[j]] - (j-1)^2*L[[j-1]]

    summary(L[[5]])
    predict(L[[5]], x-1)
    L[[5]](x-1)

    coef(L)

[Package PolynomF version 1.0-1 Index]