make.env: Construct vertical habitat envelopes for concurrent...

In galuardi/analyzepsat: Microwave Telemtry PSAT analysis

Description

Vertical habitat envelopes are constructed from a data frame containing concurrent temperature, depth and time information. This is done by summing the occurence of each combined temperature and depth occurence across a range of temperatue and depth bins. Since MTI tags are delivered in time series fashion, % time can't be used. This function may be used on recovered tag data as well (i.e. built from MWTextract.arch).

Usage

make.env(allhv, fixz = F, plot = F, mbz = c(-250), mbt = c(25), log = T, mmar = c(4, 6, 2, 6), mcex = 1.2)

Arguments

allhv	data frame with date, dpeth, and temperature information. For MTI tags, this is typically delivered in a 15 minute or one hour time series. The allhv object may be contructed with the merge.hv and merge.tz functions.
fixz	For MTI tags, there is a limitation in the precision of depth related to change in depth between 15 minute hourly increments. If you didn't deal with this previously, it might be a good idea to flag this to TRUE
plot	Plots the log of the count of each ocurence of temperature and depth bin
mbz	Maximum depth bin used
mbt	Maximum temperature bin used
log	If TRUE, yields the log of the counts
mmar	If plotting, controls the margins
mcex	If plotting, controls the character size

Value

A list containing a table of counts, temperature bins and depth bins

Author(s)

Benjamin Galuardi

References

Luo, J., Prince, E. D., Goodyear, C. P., Luckhurst, B. E. & Serafy, J. E. Vertical habitat utilization by large pelagic animals: a quantitative framework and numerical method for use with pop-up satellite tag data Fisheries Oceanography, 2006, 15, 208-229

See Also

merge.hv,merge.tz

Examples

# Random example
TT = rgamma(1000,10)
ZZ = rgamma(1000,20,.2)*-1
dat = data.frame(Ext_T = TT, depth = ZZ)
make.env(dat, plot = T)

galuardi/analyzepsat documentation built on May 17, 2019, 3:25 p.m.