calculate_n: Function to calculate the number of hexagonal grids
In validmeasures/spatialsampler: An Implementation of the Centric Systematic Area Sampling (CSAS) and Simple Spatial Sampling Method (S3M) sampling approaches in R
Description
Usage
Arguments
Value
Examples
Description
Function to calculate the number of hexagonal grids
Usage
1
calculate_n(x, d = NULL, area = NULL, country)
Arguments
x
A class SpatialPolygons or SpatialPolygonsDataFrame object defining
the area to be sampled
d
A numeric value for length (in kilometres) of the maximum distance
of a village/community from a sampling point.
area
A numeric value for area (in square kilometres) of a hexagon in a
hexagonal grid defining the sampling spatial resolution
country
Name of country where sampling area is located. This is used
to determine the appropriate UTM projection to transform x
Value
A numeric value for number of hexagons to divide sampling area based
on a specified d or a specified hexagon area size.
Examples
1
2
3
4
# Calculate number of hexagons to create a sampling grid with a d = 10 kms
# on Sennar State in Sudan
sennar <- subset(sudan01, STATE == "Sennar")
calculate_n(x = sennar, d = 10, country = "Sudan")
validmeasures/spatialsampler documentation built on Oct. 16, 2021, 3:15 a.m.
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Description Usage Arguments Value Examples
Description
Function to calculate the number of hexagonal grids
Usage
1 | calculate_n(x, d = NULL, area = NULL, country)
|
Arguments
x |
A class SpatialPolygons or SpatialPolygonsDataFrame object defining the area to be sampled |
d |
A numeric value for length (in kilometres) of the maximum distance of a village/community from a sampling point. |
area |
A numeric value for area (in square kilometres) of a hexagon in a hexagonal grid defining the sampling spatial resolution |
country |
Name of country where sampling area is located. This is used
to determine the appropriate UTM projection to transform |
Value
A numeric value for number of hexagons to divide sampling area based
on a specified d or a specified hexagon area size.
Examples
1 2 3 4 | # Calculate number of hexagons to create a sampling grid with a d = 10 kms
# on Sennar State in Sudan
sennar <- subset(sudan01, STATE == "Sennar")
calculate_n(x = sennar, d = 10, country = "Sudan")
|
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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