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dfyr
2008 Feb 07
0
Help w/ density() usage
...Fishery Biology (due to Bhattacharya, 1967): analysis of length-frequency distribution of fish larvae to id cohorts and later estimate growh rates!
I've trouble with the 1st step: using kernel density estimation (KDE) function to examine size-freq distributions (variable sl):
> density(sl[dofyr==139],bw="nrd0") (dofyr means day of year and refers to a particular sampling date)
> kd139
Call:
density.default(x = sl[dofyr == 139], bw = "nrd0")
Data: sl[dofyr == 139] (55 obs.); Bandwidth 'bw' = 0.4234
x y
Min....