View source: R/das_chop_section.R
das_chop_section | R Documentation |
Chop DAS data into effort segments by continuous effort section
das_chop_section(x, ...)
## S3 method for class 'data.frame'
das_chop_section(x, ...)
## S3 method for class 'das_df'
das_chop_section(x, conditions, distance.method = NULL, num.cores = NULL, ...)
x |
an object of class |
... |
ignored |
conditions |
see |
distance.method |
character; see |
num.cores |
see |
WARNING - do not call this function directly! It is exported for documentation purposes, but is intended for internal package use only.
This function is simply a wrapper for das_chop_equallength
.
It calls das_chop_equallength
, with seg.km
set to a
value larger than the longest continuous effort section in x
.
Thus, the effort is 'chopped' into the continuous effort sections and then summarized.
See the Examples section for an example where the two methods give the same output. Note that the longest continuous effort section in the sample data is ~22km.
See das_chop_equallength
. The randpicks values will all be NA
y <- system.file("das_sample.das", package = "swfscDAS")
y.proc <- das_process(y)
y.eff1 <- das_effort(y.proc, method = "equallength", seg.km = 25, num.cores = 1)
y.eff2 <- das_effort(y.proc, method = "section", num.cores = 1)
all.equal(y.eff1, y.eff2)
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