Package: cndplantanalysis
Type: Package
Title: Compositional Nutrient Diagnosis for Plant Tissue Analysis
Version: 1.0.2
Authors@R: 
  c(
    person(
      "Blesson B.", "Varghese",
      email = "blessonvarghese1234@gmail.com",
      role = c("aut", "cre")
    ),
    person(
      "Rohith", "A K",
      email = "rohithosm@gmail.com",
      role = "aut"
    ),  
    person(
      "Anjali", "S.",
      email = "anjaliscdlm@gmail.com",
      role = "aut"
    ), 
    person(
      "Aliya Shirin", "K S",
      email = "aliyashirin1998@gmail.com",
      role = "aut"
    ),  
    person(
      "Hilal", "Mohamed",
      email = "hilalmohamed10m@gmail.com",
      role = "aut"
    )  
  )
Description: Provides an implementation of Compositional Nutrient
        Diagnosis (CND) for plant tissue tests. Computes scale
        invariant simplex filling values(Rd), row-centered log-ratios
        (CLR), iterative database partitioning via Cate-Nelson
        procedures, cubic polynomial regression of cumulative variance
        ratio functions to determine inflection point yield cutoffs,
        critical CND nutrient imbalance thresholds (r^2) using the
        chi-square distribution, diagnostic standardized indices (Ix)
        and automated Cate Nelson scatter partitioning. Includes
        linear, non-linear, cumulative variance, chi-square and
        quadrant plotting functions.Methodology and theoretical
        frameworks are grounded in Parent and Dafir (1992)
        <doi:10.21273/JASHS.117.2.239> and Khiari et al. (2001)
        <doi:10.2134/agronj2001.934802x>.
License: GPL-3
Encoding: UTF-8
RoxygenNote: 7.3.2
Imports: ggplot2, graphics, utils, stats
Suggests: readxl, testthat (>= 3.0.0)
Config/testthat/edition: 3
Depends: R (>= 3.5)
LazyData: true
NeedsCompilation: no
Packaged: 2026-10-21 20:56:23 UTC; root
Author: Blesson B. Varghese [aut, cre], Rohith A K [aut], Anjali S.
        [aut], Aliya Shirin K S [aut], Hilal Mohamed [aut]
Maintainer: Blesson B. Varghese <blessonvarghese1234@gmail.com>
Repository: https://cran.r-universe.dev
Date/Publication: 2026-10-21 15:40:13 UTC
RemoteUrl: https://github.com/cran/cndplantanalysis
RemoteRef: HEAD
RemoteSha: 0dcffe2fd0ccefed1876cab26745d40b8671282e