tMinMaxToHourly: Converts daily to hourly temperatures

In CentreForHydrology/CRHMr: Pre- and post- processing for CRHM

Converts daily to hourly temperatures

Description

Converts daily values of tmin, tmax and (if they exist) tmean to hourly values, by spline interpolation. Only single columns of the daily temperatures can be used.

Usage

tMinMaxToHourly(
  obs,
  tmin.col = 0,
  tmax.col = 0,
  tmean.col = 0,
  tmin.time = "07:00",
  tmax.time = "15:00",
  tmean.time = "12:00",
  timezone = "",
  quiet = TRUE,
  logfile = ""
)

Arguments

obs	Required. A CRHMr obs dataframe.
tmin.col	Optional. The number of the tmin column (omitting the datetime) in the obs dataframe. If omitted, the column named 'tmin' will be used. There must be a tmin column in the dataset
tmax.col	Optional. The number of the tmax column (omitting the datetime) in the obs dataframe. If omitted, the column named 'tmax' will be used. There must be a tmax column in the dataset.
tmean.col	Optional. The number of the tmax column (omitting the datetime) in the obs dataframe. If omitted, the column named 'tmean' will be searched for. This column need not be present in the dataset. If the value is set to -1, then the mean temperature will not be used in the interpolation.
tmin.time	Optional. The time of day at which the minimum air temperature occurs, specified in HH:MM format. If not specified, defaults to 07:00.
tmax.time	Optional. The time of day at which the maximum air temperature occurs, specified in HH:MM format. If not specified, defaults to 15:00.
tmean.time	Optional. The time of day at which the maximum air temperature occurs, specified in HH:MM format. If not specified, defaults to 12:00.
timezone	Required. The name of the timezone of the data as a character string. This should be the timezone of your data, but omitting daylight savings time. Note that the timezone code is specific to your OS. To avoid problems, you should use a timezone without daylight savings time. Under Linux, you can use CST and MST for Central Standard or Mountain Standard time, respectively. Under Windows or OSX, you can use etc/GMT+6 or etc/GMT+7 for Central Standard and Mountain Standard time. DO NOT use America/Regina as the time zone, as it includes historical changes between standard and daylight savings time.
quiet	Optional. Suppresses display of messages, except for errors. If you are calling this function in an R script, you will usually leave quiet=TRUE (i.e. the default). If you are working interactively, you will probably want to set quiet=FALSE.
logfile	Optional. Name of the file to be used for logging the action. Normally not used.

Value

If successful, returns an obs dataframe with the hourly air temperatures. If not successful, returns FALSE.

Note

Interpolation over intervals longer than 1 day is not allowed.

Author(s)

Kevin Shook

See Also

interpolate

Examples

## Not run: 
MSC.hourly <- tMinMaxToHourly(MSC.daily, timezone='etc/GMT+7')
## End(Not run)

CentreForHydrology/CRHMr documentation built on April 6, 2024, 5:27 p.m.