# vec2Lfd: Make a Linear Differential Operator Object from a Vector In fda: Functional Data Analysis

 vec2Lfd R Documentation

## Make a Linear Differential Operator Object from a Vector

### Description

A linear differential operator object of order \$m\$ is constructed from the number in a vector of length \$m\$.

### Usage

``````vec2Lfd(bwtvec, rangeval=c(0,1))
``````

### Arguments

 `bwtvec` a vector of coefficients to define the linear differential operator object `rangeval` a vector of length 2 specifying the range over which the operator is defined

### Value

a linear differential operator object

### References

Ramsay, James O., Hooker, Giles, and Graves, Spencer (2009), Functional data analysis with R and Matlab, Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2005), Functional Data Analysis, 2nd ed., Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2002), Applied Functional Data Analysis, Springer, New York.

`int2Lfd`, `Lfd`

### Examples

``````#  define the harmonic acceleration operator used in the
#  analysis of the daily temperature data
Lcoef <- c(0,(2*pi/365)^2,0)
harmaccelLfd <- vec2Lfd(Lcoef, c(0,365))

hmat <- vec2Lfd(matrix(Lcoef, 1), c(0, 365))

all.equal(harmaccelLfd, hmat)

``````

fda documentation built on May 29, 2024, 11:26 a.m.