This function calculates spatial balance grid cell extent and proportions for a survey design. The user must provide either sbc.frame or values for dx, dy, xc, and yc.
sbcsamp(spsample, sbc.frame = NULL, dx = NULL, dy = NULL,
xc = NULL, yc = NULL)
Object of class SpatialDesign produced by either the grts or irs functions that contains survey design information and additional attribute (auxiliary) variables.
The object created by the sbcframe function. The default is NULL.
Grid cell x-coordinate increment value. The default is NULL.
Grid cell y-coordinate increment value. The default is NULL.
Vector of grid cell x-coordinates. The default is NULL.
Vector of grid cell y-coordinates. The default is NULL.
List containing the following components:
the sample extent for each grid cell
the sample proportion for each grid cell