WTdiff: World Average Winter Temperature Change (1963-1967 Vs...

In sspline: Smoothing Splines on the Sphere

Description

The WTdiff data frame has 1391 rows and 4 columns. It contains the average temperature change from 1963-1967 to 1993-1997 for those stations having non-missing observations on the winter (Dec-Feb) for ten years (1963-1967 and 1993-1997).

Usage

WTdiff

Format

This data frame contains the following columns:

recid

a numeric vector containing the coded information of the stations (length 11). The first three digits represent the country code; the next five digits, the station number; the last three digits, whether a station is a WMO staion or close to one.

lon

a numeric vector containing the longitudes (in degrees) of the stations.

lat

a numeric vector containing the latitudes (in degrees) of the stations.

avgd

a numeric vector containing the average temperature change from 1963-1967 to 1993-1997 for the stations.

Source

The Global Historical Climatology Network (GHCN)
http://www.ncdc.noaa.gov/cgi-bin/res40.pl?page=ghcn.html

Examples

## Fit a smoothing spherical spline with part of the data
subdat <- WTdiff[sample(nrow(WTdiff), 200), 2:4]
attach(subdat)

smooth.sspline(lon, lat, avgd)

detach(subdat)

Example output

Call:
  smooth.sspline(lon = lon, lat = lat, y = avgd)

Sample Size n: 200 
Order of Smooth: 2 
Smoothing Par: 0 
GCV Criteria: 0.6201889 
Estimated Var: 0 

sspline documentation built on May 2, 2019, 2:17 a.m.