| Library: | fda |
| See also: | fdamean plotfd grfd evalfd |
| Quantlet: | evalfdacov | |
| Description: | evaluates the cov function of a fdobject at the vector EVALARG x EVALARG |
| Usage: | fdavar = evalfdacov(evalarg,fdobject) | |
| Input: | ||
| evalarg | m x 1 matrix for evaluation | |
| fdobject | list, functional object (fd object) with n replications | |
| Output: | ||
| fdacov | m^2 x 3 vector, values of cov(t1,t2) at t1,t2 in evalarg, fdacov[,3]=cov(fdacov[,1],fdacov[,2]) | |
library("fda")
y = read("dailtemp.dat")
tvec=#(1:365)/365
fdb = createfdbasis("fourier", #(0,1),31,1)
fdtempf31=data2fd(y,tvec,fdb)
fdacovf=evalfdacov(grid(0,1/30,29),fdtempf31)
fdacovf
The cov function for temperature dataset is printed, using 31 Fourier functions