age_corr: Function that corrects chronologies for sudden jumps in time

In ShellChron: Builds Chronologies from Oxygen Isotope Profiles in Shells

Description

Some occurrences in the model results can lead the CumDY function to detect extra year transitions, resulting in sudden jumps in the shell chronology or a start of the chronology at an age beyond 1 year. This function removes these sharp transitions and late onset by adding or subtracting whole years to the age result.

Usage

age_corr(resultarray, T_per = 365, plot = TRUE, agecorrection = TRUE)

Arguments

resultarray	Array containing the full results of the optimized growth model
T_per	The period length of one year (in days)
plot	Should the results be plotted? (/codeTRUE/FALSE)
agecorrection	Correct for jumps in age (/codeTRUE) or only for starting time (/codeFALSE)

Value

An updated and corrected version of resultarray

References

package dependencies: ggplot2 3.2.1

Examples

testarray <- array(NA, dim = c(20, 16, 9)) # Create empty array
# with correct third dimension
windowfill <- seq(10, 100, 10) # Create dummy simulation data 
# (ages) to copy through the array
for(i in 6:length(testarray[1, , 1])){
    testarray[, i, 3] <- c(windowfill,
        rep(NA, length(testarray[, 1, 3]) - length(windowfill)))
    windowfill <- c(NA, windowfill + 31)
}
testarray2 <- age_corr(testarray, 365, FALSE, FALSE) # Apply function on 
array

ShellChron documentation built on July 5, 2021, 5:06 p.m.