compare_classifications: Combine classification results

In KiranLDA/PAMLr: Suite Of Functions For Manipulating Pressure, Activity, Magnetism, Temperature And Light Data In R

Combine classification results

Description

this function takes multiple classifications of the same data and compares the agreement between each, on a timepoint level.

Usage

compare_classifications(date, classifications)

Arguments

date	datetime in POSIXCT format. See hoopoe$activity$date for example
classifications	a dataframe containing the results from different classifications in each column. The classifications must correspond to the same datetimes.

Value

a dataframe containing date

the raw classifications

each state with the number of times it was used in a classification

whether or not all classes provided the same state

Examples

## Not run: 
# Import data
data(hoopoe)
start = as.POSIXct("2016-07-01","%Y-%m-%d", tz="UTC")
end = as.POSIXct("2017-06-01","%Y-%m-%d", tz="UTC")
PAM_data= create_crop(hoopoe,start,end)

# perform one classification using classifyFLAP
classification = classify_flap(dta = PAM_data$acceleration, period = 12)
# Put the classification in the same resolution as pressure
class1 = create_merged_classification(from = classification$timetable$start,
                            to = classification$timetable$end,
                            # because the timetable only contains migration periods
                            classification = rep_len(1,length(classification$timetable$end)),
                            add_to = PAM_data$pressure)
# Convert to categories
class1 = ifelse(class1 == classification$migration, "Migration", "Other")


# Perform another classification using pressure difference
class2 = c(0,ifelse(abs(diff(PAM_data$pressure$obs))>2, "Migration", "Other"))

# both classes have been converted to the same time intervals as pressure,
date = PAM_data$pressure$date

# Combine the classifications into a dataframe
classifications = data.frame(flap = class1, # flapping classification
                            Pdiff = class2) # pressure difference classification

class_comparison = compare_classifications(date=date,
                                classifications=classifications)

plot(PAM_data$pressure$date,
     PAM_data$pressure$obs,
     type = "l",
     xlab = "Date",
     ylab = "Pressure (hPa)",
     col = "royalblue3")

points(PAM_data$pressure$date,
       PAM_data$pressure$obs,
       cex = class_comparison$Migration / 2,
       col ="orange",
       pch = 16)

## End(Not run)

KiranLDA/PAMLr documentation built on April 5, 2025, 6:12 a.m.