compr.event: This funciton compresses the data stored in 'x' by averaging...

In arnejohannesholmin/sonR: Library for reading, processing and converting sonar data to the TSD format

This funciton compresses the data stored in 'x' by averaging (either mean, trimmed mean or median) in depth and time bins. This is designed primarily for echosounder beams.

Description

This funciton compresses the data stored in 'x' by averaging (either mean, trimmed mean or median) in depth and time bins. This is designed primarily for echosounder beams.

(Internal) Read and write one Simrad raw file.

This funciton compresses the data stored in 'x' by averaging (either mean, trimmed mean or median) in depth and time bins. This is designed primarily for echosounder beams.

Usage

compr.event(
  event,
  filenr = "all",
  tres = NULL,
  xres = NULL,
  zres = NULL,
  rres = NULL,
  bres = NULL,
  cores = 1,
  funvbsc = c("mean", "median"),
  funt = c("median", "mean"),
  adds = NULL,
  split = TRUE,
  skipAngles = TRUE,
  origin = 1,
  z0 = 0,
  cruise = NULL,
  esnm = "EK60",
  msg = TRUE,
  write = TRUE,
  filesize = 3e+08,
  chunksize = 3e+08,
  clear_individual = TRUE,
  clear_along = FALSE,
  maxlenb = NULL,
  ow = FALSE,
  ...
)

compr.event_oneFile_write(
  i,
  indt,
  filelist,
  pingsfiles,
  vesselfiles,
  beamsfiles,
  t = "all",
  drop = TRUE,
  compress = FALSE,
  TIME = NULL,
  write = TRUE,
  tres = NULL,
  xres = NULL,
  zres = NULL,
  rres = NULL,
  bres = NULL,
  funvbsc = c("mean", "median"),
  funt = c("median", "mean"),
  adds = list(),
  split = TRUE,
  skipAngles = TRUE,
  origin = 1,
  z0 = 0,
  pingsnames = NULL,
  vesselnames = NULL,
  beamsnames = NULL,
  dumpfiles = NULL,
  maxlenb = NULL,
  ...
)

compr.TSD(
  data = NULL,
  tres = NULL,
  xres = NULL,
  zres = NULL,
  rres = NULL,
  bres = NULL,
  funvbsc = c("mean", "median"),
  funt = c("median", "mean"),
  adds = list(),
  split = TRUE,
  skipAngles = TRUE,
  origin = 1,
  z0 = 0,
  drop = FALSE,
  ...
)

Arguments

tres	The time resolution of the compressed data in seconds.
xres	The sailed distance resolution of the compressed data in meters.
zres	The depth resolution of the compressed data in meters.
rres	The range resolution of the compressed data in meters.
bres	The beam resolution of the compressed data in integer number.
cores	is an integer specifying the number of cores to run the compression over in parallel (should be ler than the number of cores in the computer).
funvbsc	is the function to apply in the compression, either given as function or as a string, in which case the strings "mean" and "median" represents fast versions of the functions with the corresponding names (sum()/length() and fastMedian(), respectively). Default is mean, which is recommended for volume backscattering coefficient (sv) data, which are by nature exponentially distributed (backscattering from multiple targets), and using median will underestmate the true backscatter.
funt	is the same as funvbsc, but used for averaging vessel data in the new time/distance bins.
adds	is a list of additional data overriding corresponding variables in 'data'
split	used in psx.TSD().
skipAngles	is TRUE to discard electircal angles from the data (saves time).
origin	is either the time index of the origin, or the origin itself, given as c(longitude, latitude).
write	is FALSE to only return the data and not write to TSD file.
ow	Logical: If TRUE, overwrite the latest compression (directory).
...	further arguments passed to psx.TSD().
data	is the list of inputs variables as returned from EKRaw2TSD().

arnejohannesholmin/sonR documentation built on April 14, 2024, 11:39 p.m.