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spreval
View on CRAN: Click
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Download and install spreval package within the R console
Install from CRAN:
install.packages("spreval")
Install from Github:
library("remotes")
install_github("cran/spreval")
Install by package version:
library("remotes")
install_version("spreval", "1.1.0")
Attach the package and use:
library("spreval")
Maintained by
Garry Grabow
[Scholar Profile | Author Map]
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2021-07-06
Latest Update: 2022-03-23
Description:
Processing and analysis of field collected or simulated sprinkler system catch data (depths) to characterize irrigation uniformity and efficiency using standard and other measures. Standard measures include the Christiansen coefficient of uniformity (CU) as found in Christiansen, J.E.(1942, ISBN:0138779295, "Irrigation by Sprinkling"); and distribution uniformity (DU), potential efficiency of the low quarter (PELQ), and application efficiency of the low quarter (AELQ) that are implementations of measures of the same notation in Keller, J. and Merriam, J.L. (1978) "Farm Irrigation System Evaluation: A Guide for Management" <https://pdf.usaid.gov/pdf_docs/PNAAG745.pdf>. spreval::DU.lh is similar to spreval::DU but is the distribution uniformity of the low half instead of low quarter as in DU. spreval::PELQT is a version of spreval::PELQ adapted for traveling systems instead of lateral move or solid-set sprinkler systems. The function spreval::eff is analogous to the method used to compute application efficiency for furrow irrigation presented in Walker, W. and Skogerboe, G.V. (1987,ISBN:0138779295, "Surface Irrigation: Theory and Practice"),that uses piecewise integration of infiltrated depth compared against soil-moisture deficit (SMD), when the argument "target" is set equal to SMD.The other functions contained in the package provide graphical representation of sprinkler system uniformity, and other standard univariate parametric and non-parametric statistical measures as applied to sprinkler system catch depths. A sample data set of field test data spreval::catchcan (catch depths) is provided and is used in examples and vignettes. Agricultural systems emphasized, but this package can be used for landscape irrigation evaluation, and a landscape (turf) vignette is included as an example application.
How to cite:
Garry Grabow (2021). spreval: Evaluation of Sprinkler Irrigation Uniformity and Efficiency. R package version 1.1.0, https://cran.r-project.org/web/packages/spreval
Previous versions and publish date:
1.0.0 (2021-07-06 11:20)
Other packages that cited spreval R package
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Other R packages that spreval depends,
imports, suggests or enhances
Functions, R codes and Examples using
the spreval R package
Some associated functions: AELQ . CU . DU.lh . DU . PELQ . PELQT . adper . catchcan . eda.shape . eda.stats . eff . overlap . plotss . quart . rotecdf . sfplot . travunif .
Some associated R codes: AELQ.R . CUDU.R . PELQ.R . edastats.R . overlap.R . plotss.R . rotecdf.R . travunif.R . Full spreval package functions and examples
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