VisCount-package: R package for training and evaluating visual count estimates

In VisCount: R package for training and evaluating visual count estimates

Description

The VisCount package allows you to train rapid visual estimates of the number of individuals (symbols or pictures) in the plotting window, enter your estimates, and get a series of insightful statistics on your performance and how it evolves along different training sessions. It can also be a practical and economical tool for the training and calibration of field teams collecting information on the sizes of flocks or populations.

Details

Package:	VisCount
Type:	Package
Version:	1.1
Date:	2014-10-14
License:	GPL-3

Author(s)

A. Marcia Barbosa Maintainer: A. Marcia Barbosa <[e-mail]>

References

Barbosa A.M. (submitted) VisCount: a free software tool to train and evaluate visual count estimates.

Examples

## Not run: 

# BASIC WORKFLOW:

getSavedResults()  # at the start of any new VisCount session

visCount()  # repeat as desired (additional options below)

removeTypo()  # if necessary

saveResults()  # do this before quitting R

visCountStats()



# IN MORE DETAIL:

# load previous VisCount results
# (if you've used VisCount before on this computer):

getSavedResults()


# practise visCount and enter your estimates as prompted:

visCount()  # repeat until bored


# practise also with different shapes, sizes, colours and backgrounds:

visCount(shape = "^", bg = "white")

visCount(shape = "~", size = 1.3)

visCount(shape = "x", size = 2, col = "brown")

visCount(shape = "Y", bg = "wheat")


# practise with different number limits
# (you can combine with any of the arguments above):

visCount(Nmax = 500, Nmin = 100)


# you can also use animal and/or background pictures in PNG format
# (you need to have the png R package installed for this);
# here are some examples with downloaded public domain images:

download.file(url = "http://viscount.r-forge.r-project.org/img/flamingo_flying.png", 
destfile = "flamingo_flying.png")
download.file(url = "http://viscount.r-forge.r-project.org/img/clouds.png", 
destfile = "clouds.png")

visCount(shape = "flamingo_flying.png", bg = "lightblue")

visCount(shape = "flamingo_flying.png", size = 0.5, bg = "clouds.png")


download.file(url = "http://viscount.r-forge.r-project.org/img/gull_standing.png", 
destfile = "gull_standing.png")
download.file(url = "http://viscount.r-forge.r-project.org/img/water.png", 
destfile = "water.png")

visCount(shape = "gull_standing.png", bg = "grey")

visCount(shape = "gull_standing.png", bg = "water.png")


# if your last estimate was a mistake, remove it from record:

removeTypo()


# check out your performance statistics:

visCountStats()


# remove particular trials (e.g. 3 and 7) from records and stats:

removeTypo(c(3, 7))


# check performance stats for particular sessions:

visCountStats(c(1, 3:7))


# before quitting R, save your results on disk for future use:

saveResults()


## End(Not run)

VisCount documentation built on May 2, 2019, 4:52 p.m.