gdistance - Distances and Routes on Geographical Grids
Provides classes and functions to calculate various distance measures and routes in heterogeneous geographic spaces represented as grids. The package implements measures to model dispersal histories first presented by van Etten and Hijmans (2010) <doi:10.1371/journal.pone.0012060>. Least-cost distances as well as more complex distances based on (constrained) random walks can be calculated. The distances implemented in the package are used in geographical genetics, accessibility indicators, and may also have applications in other fields of geospatial analysis.
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10.45 score 17 stars 24 dependents 562 scripts 4.1k downloads
gosset - Tools for Data Analysis in Experimental Agriculture
Methods to analyse experimental agriculture data, from data synthesis to model selection and visualisation, with a focus on ranking data from decentralised on-farm trials with the 'tricot' approach (van Etten et al. 2019 <doi:10.1017/S0014479716000739>). Includes tools to build rankings, fit and cross-validate Plackett-Luce models and trees, compare traits with Kendall's tau, and summarise results as worth, regret and preference indices. The package is named after W.S. Gosset aka 'Student', a pioneer of modern statistics in small sample experimental design and analysis.
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experimental-designrankings-data
6.14 score 7 stars 33 scripts 571 downloads
climatrends - Climate Variability Indices for Ecological Modelling
Computes climate indices for the analysis of climate trends and for ecological and crop modelling: temperature and precipitation indices (Aguilar et al. 2005 <doi:10.1029/2005JD006119>), growing degree-days, late spring frost, crop-sensitive heat stress indices (Challinor et al. 2016 <doi:10.1038/nclimate3061>) and reference evapotranspiration. Indices are computed from local data or from daily data fetched from 'NASA POWER' for each site, with start dates and lengths that can differ between sites, as in decentralised on-farm trials.
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climate-dataclimatologytimeseries-analysis
5.68 score 4 stars 8 scripts 534 downloadsag5Tools - Toolbox for Downloading and Extracting Copernicus AgERA5 Data
Tools for downloading and extracting data from the Copernicus "Agrometeorological indicators from 1979 to present derived from reanalysis" <https://cds.climate.copernicus.eu/datasets/sis-agrometeorological-indicators?tab=overview> (AgERA5).
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agriculture-researchagrometeorologicalclimate-data
5.13 score 8 stars 17 scripts 525 downloadsClimMobTools - API Client for the 'ClimMob' Platform
API client for 'ClimMob', an open source software for decentralized large-N trials with the 'tricot' approach <https://climmob.net/>. Developed by van Etten et al. (2019) <doi:10.1017/S0014479716000739>, it turns the research paradigm on its head; instead of a few researchers designing complicated trials to compare several technologies in search of the best solutions for the target environment, it enables many participants to carry out reasonably simple experiments that taken together can offer even more information. 'ClimMobTools' lets project managers retrieve, explore and analyse their 'ClimMob' data in R, design trials with sequentially balanced incomplete blocks, and protect the privacy of participants' locations before data are shared.
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agriculture-researchcitizen-sciencecrowdsourcingrandomized-controlled-trials
4.95 score 1 stars 3 scripts 614 downloads