Samples along the year dimension

A resample from an FLQuant object along the 'year' dimension is returned. The 'year' dimnames of the output object can be specified, although that is not needed if the resample is to be assigned in a slot.

Usage

yearSample(x, size = length(years), years, replace = TRUE, prob = NULL)

Arguments

x

An FLQuant object.

size

Number of samples (years), non-negative integer.

years

Optional vector to set as 'year' dimnames in output.

replace

should sampling be with replacement? Defaults to TRUE.

prob

a vector of probability weights.

Value

RETURN Description, class

See also

FLQuant sample()

Author

Iago Mosqueira (WMR)

Examples

data(ple4)
# Take 20 samples of recent recruitment 
yearSample(rec(ple4)[, ac(2013:2017)], 20)
#> An x of class "FLQuant"
#> , , unit = unique, season = all, area = unique
#> 
#>    year
#> age 2016    2017    2017    2013    2013    2013    2016    2014    2017   
#>   1 1211320 1823000 1823000 1455050 1455050 1455050 1211320 1640700 1823000
#>    year
#> age 2015    2017    2015    2015    2016    2015    2014    2014    2015   
#>   1  895620 1823000  895620  895620 1211320  895620 1640700 1640700  895620
#>    year
#> age 2015    2014   
#>   1  895620 1640700
#> 
#> units:  1000 
# Providing 'years' sets the output object dimnames
yearSample(rec(ple4)[, ac(2013:2017)], 20, year=2000:2019)
#> An x of class "FLQuant"
#> , , unit = unique, season = all, area = unique
#> 
#>    year
#> age 2000    2001    2002    2003    2004    2005    2006    2007    2008   
#>   1 1455050 1640700 1455050 1823000 1455050  895620 1455050 1823000 1640700
#>    year
#> age 2009    2010    2011    2012    2013    2014    2015    2016    2017   
#>   1 1823000 1823000 1823000  895620 1823000 1640700 1823000 1455050 1640700
#>    year
#> age 2018    2019   
#>   1 1211320  895620
#> 
#> units:  1000