SpatialVx (version 1.0-2)

GFSNAMfcstEx: Example Verification Set

Description

Example verification set of accumulated precipitation (mm) with 361 time points in addition to 2352 spatial locations on a grid. Taken from a real, but unknown, weather model and observation analysis (one of GFS or NAM). Accumulation is either 3-h or 24-h.

Usage

data(GFSNAMfcstEx)
data(GFSNAMobsEx)
data(GFSNAMlocEx)

Format

The format is: num [1:2352, 1:361] 0 0 0 0 0 ...

The format is: num [1:2352, 1:361] 0 0 0 0 0 ...

The format is: A data frame with 2352 observations on the following 2 variables.

Lat

a numeric vector of latitude coordinates for GFS/NAM example verification set.

Lon

a numeric vector of longitude coordinates for GFS/NAM example verification set.

Details

Example verification set with 2352 spatial locations over the United States, and 361 time points. For both the forecast (GFSNAMfcstEx) and verification (GFSNAMobsEx), these are numeric matrices whose rows represent time, and columns represent space. The associated lon/lat coordinates are provided by GFSNAMlocEx (2352 by 2 data frame with named components giving the lon and lat values).

Note that the available spatial locations are a subset of the original 70 X 100 60-km grid where each time point had no missing observations. This example set is included with the package simply toi demonstrate some functionality that involves both space and time; though this is mostly a spatial-only package.

Examples

data( "GFSNAMfcstEx" )
data( "GFSNAMobsEx" )
data( "GFSNAMlocEx" )

x <- colMeans(GFSNAMfcstEx, na.rm=TRUE)
y <- colMeans(GFSNAMobsEx, na.rm=TRUE)
look <- as.image(x - y, x=GFSNAMlocEx)
image.plot(look)