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Prepare SaTScan Grid File

Source: R/prep_grd.R
prep_grd.Rd

[Superseded]

Usage

prep_grd(x, loc_id = NULL, coords = NULL)

Arguments

x

Input object (sf or data.frame).

loc_id

Column name for location ID (unquoted).

coords

Character vector of length 2 (required if x is data.frame).

Value

A satscan_table object of kind "grd".

Details

Prepares a grid file for SaTScan, which defines the centers of the scanning windows. Leverages prep_geo logic for coordinate extraction and formatting.

SaTScan File Specification

The Grid File has the same structure as the Coordinates File: <LocationID> <Latitude/Y> <Longitude/X>

  • LocationID: Unique identifier for the grid point.

  • Coordinates: Same rules as prep_geo (Lat/Long order vs X/Y order).

See also

ss_grd() for the new ss_tbl interface.

Examples

if (FALSE) { # \dontrun{
# From sf grid
grid_sf <- sf::st_make_grid(study_area, n = c(10, 10)) %>% sf::st_sf()
grid_sf$id <- 1:nrow(grid_sf)

grd_obj <- prep_grd(grid_sf, loc_id = id)
} # }