nObsPoints function

Get the number of observation points

This functions returns the number of observation points in an object of class funData, multiFunData or irregFunData.

nObsPoints(object)

Arguments

• object: An object of class funData, multiFunData or irregFunData.

Returns

The number of observation points in object. See Details.

Details

Depending on the class of object, the function returns different values:

• If object is of class funData, the function returns a vector of length dimSupp(object), giving the number of observations in each dimension.
• If object is of class multiFunData, the function returns a list of the same length as object, where the j-th entry is a vector, corresponding to the observations point of object[[j]].
• If object is of class irregFunData, the function returns an array of length nObs(object), where the j-th entry corresponds to the number of observations in the j-th observed function.

Warning

Do not confound with nObs, which returns the number of observations (i.e. the number of observed functions) in an object of a functional data class.

Examples

# Univariate (one-dimensional)
object1 <- funData(argvals = 1:5, X = rbind(1:5, 6:10))
nObsPoints(object1)

# Univariate (two-dimensional)
object2 <- funData(argvals = list(1:5, 1:6), X = array(1:60, dim = c(2, 5, 6)))
nObsPoints(object2)

# Multivariate
multiObject <- multiFunData(object1, object2)
nObsPoints(multiObject)

# Univariate (irregular)
irregObject <- irregFunData(argvals = list(1:5, 2:4), X = list(2:6, 3:5))
nObsPoints(irregObject)

See Also

irregFunData, extractObs