walker: Walker Lake sample and exhaustive data sets

In gstat: Spatial and Spatio-Temporal Geostatistical Modelling, Prediction and Simulation

Description

This 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

References

Applied Geostatistics by Edward H. Isaaks, R. Mohan Srivastava; Oxford University Press.

Examples

library(sp)
data(walker)
summary(walker)
summary(walker.exh)

Example output

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                      
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  

gstat documentation built on May 2, 2019, 4:59 p.m.