Last data update: 2014.03.03
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R: Create calibration of solar elevation to measured light...
mkCalibration | R Documentation |
Create calibration of solar elevation to measured light level.
Description
Using a set of light level data from a known location create a calibration
function to return the expected light level given solar elevation.
Usage
mkCalibration(x, known = NULL, elim = c(-36, 12), choose = TRUE)
Arguments
x |
a data frame containing at least gmt and light
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known |
a known position - as a 2-element c(x, y) coordinate
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elim |
a 2-element vector of the range of solar elevation to define
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choose |
logical - choose segments from a plot or use all the data?
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Details
It is assumed that the data frame x has columns "gmt" with POSIXct
date-times and "light" with numeric light level data.
Value
A function, defined by approxfun .
Author(s)
Michael D. Sumner
See Also
approxfun
Results
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