SpatioTemporal (version 1.1.9.1)

removeSTcovarMean: Mean-Centre the Spatio-Temporal Covariate

Description

Removes the temporal mean at each location for the spatio-temporal covariares. The means are added to the covar field in the returned object and can be used as geographic covariates.

Usage

removeSTcovarMean(STdata)

Arguments

STdata

A STdata object, see mesa.data.raw.

Value

Returns a modfied version of the input, where the spatio-temporal covariates have been expanded to include covariates where the site by site temporal average has been removed. The averages are seen as geographic covariates and added to STdata$covars.

See Also

Other STdata functions: c.STmodel, createDataMatrix, createSTdata, createSTmodel, detrendSTdata, estimateBetaFields, updateTrend.STdata

Examples

# NOT RUN {
##load the data
data(mesa.data.raw)
##and create STdata-object
mesa.data <- createSTdata(mesa.data.raw$obs, mesa.data.raw$X, n.basis=2,
                          SpatioTemporal=mesa.data.raw["lax.conc.1500"])

mesa.data.mean0 <- removeSTcovarMean(mesa.data)

##compare the data structures
##geographic covariates
summary(mesa.data$covars)
summary(mesa.data.mean0$covars)

##mean of the spatio-temporal covariate, note that the new
##contains both mean-zero and original
cbind(colMeans(mesa.data$SpatioTemporal),
      colMeans(mesa.data.mean0$SpatioTemporal))

# }