effort function

effort - Effort information

Extract effort information from an Rdistance data frame. Effort is length of line-transects or number of points on point-transects.

effort(x, ...)

Arguments

• x: Either an estimated distance function, output by dfuncEstim, or an Rdistance nested data frame, output by RdistDf.
• ...: Ignored

Returns

A vector containing effort. If line-transects, return is length of transects, with units. If point-transects, return is number of points (integers, no units). Vector length is number of transects. If input is not an RdistDf or estimated distance function, return is NULL.

Examples

data(sparrowDf)
effort(sparrowDf)
fit <- dfuncEstim(sparrowDf, dist ~ 1)
effort(fit)