sleepStat {phase}

Computes and tabulates day-time and night-time sleep statistics

Description

This function allows users to estimate day-time and night-time average sleep bout duration, number and latency. Sleep bout latency is defined as the time taken (in minutes) for the occurrence of the first sleep bout since respective transitions. The input for this function must be the output from the trimData() function. The output of this function is a matrix which contains fly-wise (each row) data.

Usage

sleepStat(data, sleep.def = c(5), t.cycle = 24, photoperiod = 12)

Arguments

data

Input data file. The input for this function must be the output of the function trimData(). See ??trimData().

sleep.def

Definition of sleep. Traditionally, a single bout of sleep is defined as any duration of inactivity that is equal to or greater than 5-minutes. However, sometimes it may be of interest to examine longer bouts of sleep or specific bout durations; sleep.def allows users to change the definition of sleep. The default input is a single value vector of value 5. If users wish to analyse sleep only between 5 to 20 mins, the input must be c(5,20).

t.cycle

Define the period of the environmental cycle or a single day in hours. This defaults to 24.

photoperiod

Duration (in hours) of what can be considered day-phase. This defaults to 12.

Value

A matrix array matrix with 32 rows (one for each fly) and 9 columns:

Channel

Fly identity.

Day.BoutNumber

Number of sleep bouts in the user defined day time.

Day.BoutDuration.Mean

Mean sleep duration in the user defined day time.

Day.BoutDuration.Median

Median sleep duration in the user defined day time.

Day.Latency

Time taken for the first sleep bout to occur in the user defined day time.

Day.Total

Total minutes of daytime sleep.

Night.BoutNumber

Number of sleep bouts in the user defined night time.

Night.BoutDuration.Mean

Mean sleep duration in the user defined night time.

Night.BoutDuration.Median

Median sleep duration in the user defined night time.

Night.Latency

Time taken for the first sleep bout to occur in the user defined night time.

Night.Total

Total minutes of nighttime sleep.

Examples

td <- trimData(data = df, start.date = "19 Dec 20", start.time = "21:00",
n.days = 10, bin = 1, t.cycle = 24)
slp.stat <- sleepStat(data = td)