Walker Lake sample and exhaustive data sets
walker.RdThis is the Walker Lake data sets (sample and exhaustive data set), used in Isaaks and Srivastava's Applied Geostatistics.
Usage
data(walker)Format
This data frame contains the following columns:
- Id
Identification Number
- X
Xlocation in meter
- Y
Ylocation in meter
- V
V variable, concentration in ppm
- U
U variable, concentration in ppm
- T
T variable, indicator variable
Note
This data sets was obtained from the data sets on ai-geostats, https://wiki.52north.org/bin/view/AI_GEOSTATS/WebHome
Examples
library(sp)
data(walker)
summary(walker)
#> Object of class SpatialPointsDataFrame
#> Coordinates:
#> min max
#> X 8 251
#> Y 8 291
#> Is projected: NA
#> proj4string : [NA]
#> Number of points: 470
#> Data attributes:
#> Id V U T
#> Min. : 1.0 Min. : 0.0 Min. : 0.00 Min. :1.000
#> 1st Qu.:118.2 1st Qu.: 184.6 1st Qu.: 82.15 1st Qu.:2.000
#> Median :235.5 Median : 424.0 Median : 319.30 Median :2.000
#> Mean :235.5 Mean : 435.3 Mean : 604.08 Mean :1.904
#> 3rd Qu.:352.8 3rd Qu.: 640.9 3rd Qu.: 844.55 3rd Qu.:2.000
#> Max. :470.0 Max. :1528.1 Max. :5190.10 Max. :2.000
#> NA's :195
summary(walker.exh)
#> Object of class SpatialGridDataFrame
#> Coordinates:
#> min max
#> X 0.5 260.5
#> Y 0.5 300.5
#> Is projected: NA
#> proj4string : [NA]
#> Grid attributes:
#> cellcentre.offset cellsize cells.dim
#> X 1 1 260
#> Y 1 1 300
#> Data attributes:
#> U V
#> Min. : 0.000 Min. : 0.0
#> 1st Qu.: 6.674 1st Qu.: 67.8
#> Median : 56.902 Median : 221.2
#> Mean : 266.044 Mean : 278.0
#> 3rd Qu.: 316.351 3rd Qu.: 429.3
#> Max. :9499.508 Max. :1631.2