ordered_climate_list

Sometimes lists of strings that contain numbers aren't listed automatically in the sequence
we would expect, e.g. because numbers below ten are lacking leading zeros (as in
c("a1","a10","a100","a11"...)). This function recognizes all shared leading and trailing
symbols around the numeric part of such strings and sorts the list according to the embedded
numbers.

utility

The phenology of plants (i.e. the timing of their annual life
phases) depends on climatic cues. For temperate trees and many other plants,
spring phases, such as leaf emergence and flowering, have been found to result
from the effects of both cool (chilling) conditions and heat. Fruit tree
scientists (pomologists) have developed some metrics to quantify chilling
and heat (e.g. see Luedeling (2012) <doi:10.1016/j.scienta.2012.07.011>).
'chillR' contains functions for processing temperature records into
chilling (Chilling Hours, Utah Chill Units and Chill Portions) and heat units
(Growing Degree Hours). Regarding chilling metrics, Chill Portions are often
considered the most promising, but they are difficult to calculate. This package
makes it easy. 'chillR' also contains procedures for conducting a PLS analysis
relating phenological dates (e.g. bloom dates) to either mean temperatures or
mean chill and heat accumulation rates, based on long-term weather and phenology
records (Luedeling and Gassner (2012) <doi:10.1016/j.agrformet.2011.10.020>).
As of version 0.65, it also includes functions for generating weather
scenarios with a weather generator, for conducting climate change analyses
for temperature-based climatic metrics and for plotting results from such
analyses. Since version 0.70, 'chillR' contains a function for interpolating
hourly temperature records.

Eike Luedeling

chillR

Statistical Methods for Phenology Analysis in Temperate Fruit
Trees

Lars Caspersen

Eduardo Fernandez

ordered_climate_list function

<dl><dt>strings</dt>
<dd>vector of character strings to be sorted according to embedded numbers.</dd>
<dt>file_extension</dt>
<dd>character string specifying the extension of the file type to be selected.
This can also be any other trailing string that marks all vector elements to be selected. This isn't
required for the function to run, but may be necessary if the string list of interest contains, for
instance, different file types, of which you only want to work with one.</dd></dl>

Arguments

Author

Sort files in a folder, so that numbers are in ascending sequence — ordered_climate_list

<dl>

<dt>strings</dt>
<dd>vector of character strings to be sorted according to embedded numbers.</dd>


<dt>file_extension</dt>
<dd>character string specifying the extension of the file type to be selected.
This can also be any other trailing string that marks all vector elements to be selected. This isn't
required for the function to run, but may be necessary if the string list of interest contains, for
instance, different file types, of which you only want to work with one.</dd>

</dl>

ordered_climate_list: Sort files in a folder, so that numbers are in ascending sequence

Description

Usage

Value

Arguments

Author

Examples