arithmetic-methods: Arithmetic Operations of Functional Data Objects

In yixuan/fdaplus: Enhancement of the 'fda' package for functional data analysis

Description

Simple arithmetic operations of fd+ and bifd+ objects.

Usage

## S4 method for signature ''fd+',numeric'
e1 * e2

## S4 method for signature 'numeric,'fd+''
e1 * e2

## S4 method for signature ''fd+',numeric'
e1 / e2

## S4 method for signature ''fd+','fd+''
e1 + e2

## S4 method for signature ''fd+','fd+''
e1 - e2

## S4 method for signature ''bifd+',numeric'
e1 * e2

## S4 method for signature 'numeric,'bifd+''
e1 * e2

## S4 method for signature ''bifd+',numeric'
e1 / e2

## S4 method for signature ''bifd+','bifd+''
e1 + e2

## S4 method for signature ''bifd+','bifd+''
e1 - e2

Arguments

e1,e2

Numeric scalars, or functional data objects of class fd+ or bifd+.

Value

See Method (...) sections for the explanation of various types of results.

Method (fd+, numeric scalar)

An fd+ object can be multiplied or divided by a numeric scalar, which has the effect that all the functions in this object will be scaled by this constant.

Method (fd+, fd+)

An fd+ object can be added to or subtracted from another fd+ object, if they have the same basis, and:

• One of them contains only one function curve, so that this single function will be added to or subtracted from all the functions in the other object.

• Or, they have the same number of functions, so that addition and subtraction will be done element-wisely.

Method (bifd+, numeric scalar)

A bifd+ object can be multiplied or divided by a numeric scalar, and these operations will return the scaled bivariate function object.

Method (bifd+, bifd+)

A bifd+ object can be added to or subtracted from another bifd+ object, if they have the same bases.

Author(s)

Yixuan Qiu <http://statr.me/>

yixuan/fdaplus documentation built on May 4, 2019, 5:29 p.m.