Parameter data for the secondary sampling of a grid

A data frame containing information on the size and shape of secondary sampling units for the `comspat()` function.

Usage

param_grid

Format

A data frame with 16 observations (sampling steps) on the following 3 variables.

Steps.of.scaling

Numeric. Sampling step number

Length.of.plots

Numeric. Length of the sampling unit.

Height.of.plots

Numeric. Height of the sampling unit.

Details

The `comspat()` function requires spatially explicit information. The `params` argument stores and provides spatially explicit information. The parameter data frame for the grid and transect data (i.e., `params.grid` and `params.tran`) are available in the package. The data contains information on the number of scaling steps (`Steps.of.scaling` column) and the size (the number of primary sampling units to create the length and height of the secondary sampling unit, captured in the `Length.of.plots` and `Height.of.plots` columns) of the secondary sampling units. For example, to perform secondary sampling on a grid, the first row of the parameter data set will read 1 for `Steps.of.scaling`, `Length.of.plots` and `Height.of.plots`. If the data was sampled as a `"Transect"` only the `Length.of.plots` coordinate is required. If the data was sampled as a `"Grid"` both `Length.of.plots` and `Height.of.plots` are required.

`Length.of.plots` and `Height.of.plots` are measured in the number of sampling units.

Examples

data("param_grid", package = "comspat")
str(param_grid)
#> 'data.frame':	16 obs. of  3 variables:
#>  $ Steps.of.scaling: int  1 2 3 4 5 6 7 8 9 10 ...
#>  $ Length.of.plots : num  1 2 3 4 5 6 7 8 9 10 ...
#>  $ Height.of.plots : num  1 2 3 4 5 6 7 8 9 10 ...