LFD: Length Frequency Distribution
In MEDITS: Analysis of MEDITS-Like Survey Data

Description Usage Arguments Value Author(s) Examples

The function estimates for the selected sex the time series of the length frecency distribution (LFD)

1	LFD(merge_TATC, indices, sex, LC, depth_range, type)

`merge_TATC`	data frame cantaining the hauls data (TA, table A) and the biological data (TC, table C) merged together
`indices`	data frame with the time series of the abundance indices as estimated by the function index.ts()
`sex`	string code of the selected sex. Permitted values: "c" (sex combined), "f" (females), and "m" (males).
`LC`	numerical value of the minimum length class interval (expressed in mm)
`depth_range`	vector of the depth range for the analysis
`type`	string value to select the type of graph to be plotted. Allowed values: "indices", "density" and "boxplot"

the function returns a data frame in which the first column is the list of the lenght classes reported in the TC file and in the other columns are reported the abundance indices (n/km²) for each year of the time series by length class.

Walter Zupa

library(MEDITS)
merge_TATB <-  m.TATB(TA,TB,"ARISFOL")
merge_TATC <-  m.TATC(TA,TC,"ARISFOL")
GSA <- unique(TA$AREA)
indices <- index.ts(merge_TATB,GSA,"ARISFOL",index = "abundance",
depth_range=c(200,800),sex="f", sampling = "RSS",plot=FALSE)
LFD(merge_TATC,indices,sex="f",LC=1,depth_range=c(200,800), type = "indices")