Description Usage Arguments Details Value Author(s) See Also
Using a set of light level data from a known location create a calibration function to return the expected light level given solar elevation.
| 1 | mkCalibration(x, known = NULL, elim = c(-36, 12), choose = TRUE)
 | 
| x |  a data frame containing at least  | 
| known |  a known position - as a 2-element  | 
| elim | a 2-element vector of the range of solar elevation to define | 
| choose | logical - choose segments from a plot or use all the data? | 
It is assumed that the data frame x has columns "gmt" with POSIXct
date-times and "light" with numeric light level data. 
A function, defined by approxfun. 
Michael D. Sumner
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