summary.met: Summary for an APSIM met file

In apsimx: Inspect, Read, Edit and Run 'APSIM' "Next Generation" and 'APSIM' Classic

Summary for an APSIM met file

Description

Create a data.frame summarizing an object of class ‘met’

Usage

## S3 method for class 'met'
summary(
  object,
  ...,
  years,
  months,
  days,
  julian.days,
  compute.frost = FALSE,
  frost.temperature = 0,
  anomaly,
  check = FALSE,
  verbose = FALSE,
  na.rm = FALSE,
  digits = 2
)

Arguments

object	object of class ‘met’
...	optional argument (none used at the moment)
years	optional argument to subset years
months	optional argument to subset by months. If an integer, it should be between 1 and 12. If a character, it can be in the format, for example, ‘jan’ or ‘Jan’.
days	optional argument to subset by days. It should be an integer between 1 and 31.
julian.days	optional argument to subset by julian days. It should be a vector of integers between 1 and 365. Either use ‘days’ or ‘julian.days’ but not both.
compute.frost	logical (default FALSE). Whether to compute frost statistics.
frost.temperature	value to use for the calculation of the frost period (default is zero).
anomaly	whether to compute the anomaly. Default is FALSE. It could be TRUE (for all variables) or a character vector for a specific set of variables.
check	logical (default FALSE). Whether to ‘check’ the ‘met’ object.
verbose	whether to print additional infomation to the console
na.rm	whether to remove missing values. Passed to ‘aggregate’
digits	digits for rounding (default is 2).

Details

The frost free period is computed by first spliting each year (or year interval) in two halves. The first and last frosts in the first and second period are found. For the Northern hemisphere calendar days are used (1-365). For the Southern hemisphere the year is split in two halfs, but the second half of the year is used as the first part of the growing season. If frost is not found a zero is returned.

Value

an object of class ‘data.frame’ with attributes

Examples

extd.dir <- system.file("extdata", package = "apsimx")
ames <- read_apsim_met("Ames.met", src.dir = extd.dir)

summary(ames, years = 2014:2016)

apsimx documentation built on Sept. 11, 2024, 5:42 p.m.