algaeClassify (version 1.2.0)

sampeff: Visually assess change in sampling effort over time (author: Dietmar Straile)

Description

Visually assess change in sampling effort over time (author: Dietmar Straile)

Usage

sampeff(b_data, column, save.pdf = F, lakename = "",
  datecolumn = "date_dd_mm_yy", dateformat = "%d-%m-%y")

Arguments

b_data

Name of data.frame object

column

column name or number for field containing abundance (biomass,biovol, etc.) can be NA for presence absence

save.pdf

TRUE/FALSE Should the output plot be saved to a file? defaults to FALSE

lakename

Character string for labeling output plot

datecolumn

Character String or number specifying dataframe field with date information

dateformat

Character string specifying POSIX data format

Value

a time-series plot of minimum relative abundance over time. This should change systematically with counting effort.

Examples

# NOT RUN {
data(lakegeneva)
#example dataset with 50 rows

sampeff(lakegeneva,column=6) #column 6 contains biovolume
# }