calibrateSpeed | R Documentation |
These functions create a TDRcalibrate
object which is
necessary to obtain dive summary statistics.
calibrateSpeed( x, tau = 0.1, contour.level = 0.1, z = 0, bad = c(0, 0), main = slot(getTDR(x), "file"), coefs, plot = TRUE, postscript = FALSE, ... )
x |
An object of class |
tau |
numeric scalar: quantile on which to regress speed on rate
of depth change; passed to |
contour.level |
numeric scalar: the mesh obtained from the bivariate kernel density estimation corresponding to this contour will be used for the quantile regression to define the calibration line. |
z |
numeric scalar: only changes in depth larger than this value will be used for calibration. |
bad |
numeric vector of length 2 indicating that only rates of depth change and speed greater than the given value should be used for calibration, respectively. |
main, ... |
Arguments passed to |
coefs |
numeric: known speed calibration coefficients from
quantile regression as a vector of length 2 (intercept, slope). If
provided, these coefficients are used for calibrating speed,
ignoring all other arguments, except |
plot |
logical: whether to plot the results. |
postscript |
logical: whether to produce postscript file output. |
This calibrates speed readings following the procedure outlined in Blackwell et al. (1999).
An object of class TDRcalibrate
.
Sebastian P. Luque spluque@gmail.com
Blackwell S, Haverl C, Le Boeuf B, Costa D (1999). A method for calibrating swim-speed recorders. Marine Mammal Science 15(3):894-905.
TDRcalibrate
## Too long for checks ## Continuing the Example from '?calibrateDepth': utils::example("calibrateDepth", package="diveMove", ask=FALSE, echo=FALSE, run.donttest=TRUE) dcalib # the 'TDRcalibrate' that was created ## Calibrate speed using only changes in depth > 2 m vcalib <- calibrateSpeed(dcalib, z=2) vcalib
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