keeling_split: Keeling isotope analysis
In benfasoli/uataq: UATAQ Lab R Utilities

keeling performs keeling isotope analysis, generating a linear fit using QR regression and a d13C keeling plot.

1	keeling_split(time, co2, d13c, format = "%Y-%m-01", tz = "UTC")

`time`	POSIXct timestamps of measurements
`co2`	numeric co2 concentrations, in ppm
`d13c`	numeric d13C, in per mille
`format`	character format compatible with strptime to split the data by. Defaults to '%Y-%m-01' which indicates monthly regression statistics with floored timestamps (e.g. 2016-01-01 indicates the statistics for the month of January, 2016)
`tz`	timezone interpreted by strptime

data_frame containing the slope, yintercept, fit statistics including r_squared, rmse, std_error, and n, and lm_obj the fit object created using the lm function for each time split

benfasoli/uataq documentation built on Sept. 27, 2021, 9:29 p.m.