irslin {spsurvey} | R Documentation |
This function selects an independent random sample (IRS) of a linear resource.
irslin(shapefilename=NULL, linframe, samplesize=100, SiteBegin=1)
shapefilename |
name of the input shapefile. If shapefilename equals NULL, then the shapefile or shapefiles in the working directory are used. The default is NULL. |
linframe |
a data frame containing id, mdcaty and mdm. |
samplesize |
number of points to select in the sample. The default is 100. |
SiteBegin |
number to use for first site in the design. The default is 1. |
A data frame of IRS sample points containing: SiteID, id, x, y, mdcaty, and weight.
Tom Kincaid Kincaid.Tom@epa.gov