Description Functions Data Author(s)
An interval-valued extension of ordinary and simple kriging. Optimization of the function is based on a generalized interval distance. This creates a non-differentiable cost function that requires a differentiable approximation to the absolute value function. This differentiable approximation is optimized using a Newton-Raphson algorithm with a penalty function to impose the constraints. Analyses in the package are driven by the 'intsp' and 'intgrd' classes, which are interval-valued extensions of 'SpatialPointsDataFrame' and 'SpatialPixelsDataFrame' respectively. The package includes several wrappers to functions in the 'gstat' and 'sp' packages.
The package contains several generic functions such as
plot
,
print
,
and summary
to facilitate
interval-valued analysis. In addition to these functions,
the package also contains the following functions:
intkrige
Make predictions on
interval-valued spatial data using interval-valued kriging.
interval<-
Create an interval-valued spatial object.
intvariogram
Simultaneously calculate the empirical variograms
for an interval-valued spatial object.
fit.intvariogram
Automatically fit theoretical variograms to
empirical variograms obtained from interval-valued spatial objects.
intvCheck
Visualize the variogram fits for interval-valued
spatial objects.
dist_cpp
A c++ function to calculate great circle
or Euclidean distances.
utsnow An interval-valued design ground snow load dataset for Utah.
ohtemp An interval-valued 30 year mean temperature dataset for the Ohio River Basin.
ohMap A SpatialPolygons
shapefile for the Ohio River Basin.
Brennan Bean brennan.bean.20@gmail.com
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