daymetr (version 1.7.1)

daymet_grid_agg: Aggregate daily Daymet data

Description

Aggregates daily Daymet data by time interval to create convenient seasonal datasets for data exploration or modelling.

Usage

daymet_grid_agg(
  file,
  int = "seasonal",
  fun = "mean",
  internal = FALSE,
  path = tempdir()
)

Value

aggregated daily Daymet data as a tiff file written to disk or a raster stack when data is returned to the workspace.

Arguments

file

The name of the file to be processed. Use daily gridded Daymet data.

int

Interval to aggregate by. Options are "monthly", "seasonal" or "annual". Seasons are defined as the astronomical seasons between solstices and equinoxes (default = "seasonal")

fun

Function to be used to aggregate data. Genertic R functions can be used. "mean" and "sum" are suggested. na.rm = TRUE by default. (default = "mean")

internal

logical If FALSE, write the output to a tif file using the Daymet file format protocol.

path

path to a directory where output files should be written. Used only if internal = FALSE (default = tempdir())

Examples

 if (FALSE) {
 # This code calculates the average minimum temperature by 
 # season for a subset region.
 
 # download default ncss tiled subset for 1980
 # (daily tmin values only), works on tiles as well
 download_daymet_ncss()
     
 # Finally, run the function
 daymet_grid_agg(
  file = file.path(tempdir(),"/tmin_daily_1980_ncss.nc"),
  int = "seasonal",
  fun = "mean"
 )
 }