SSD Calculation stratified by Groups

Usage

StratSSD(Size, Sex, Strata, log = F, positiveM = F, ...)

Arguments

Size: A numerical vector giving the size of each individual as a scalar quantity
Sex: A character or factor vector recording sex for each individual as 'm' or 'f'
Strata: A character or factor vector giving the factor by which we wish to divide individuals into groups before calculating SSD
log: Defaults to FALSE, in which case you use the Lovich and Gibbons SDI to calculate SSD, if changed to TRUE you use the log ratio.
...: If Log is TRUE, then you may pass arguments to the SSDLog function this way.

Examples

data(pupfish)
with(pupfish, StratSSD(CS, Sex, Pop, log = T, positiveM = T))
#> Warning: No data found for at least one sex. Sex variable must be formatted as 'm' and 'f' (see ConvertSexFormat)
#> Warning: No data found for at least one sex. Sex variable must be formatted as 'm' and 'f' (see ConvertSexFormat)
#> Log SSD Ratio by Strata
#> $Factors
#> [1] "Marsh"    "Sinkhole"
#> 
#> $SSD
#> [1] NA NA
#>