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  • DendroTools : R package for studying linear and nonlinear responses between tree-rings and daily environmental data
    Jevšenak, Jernej ; Levanič, Tom
    We introduce in this paper the dendroTools R package for studying the statistical relationships between tree-ring parameters and daily environmental data. The core function of the package is ... daily_response(), which works by sliding a moving window through daily environmental data and calculating statistical metrics with one or more tree ring proxies. Possible metrics are correlation coefficient, coefficient of determination and adjusted coeffi- cient of determination. In addition to linear regression, it is possible to use a nonlinear artificial neural network with the Bayesian regularization training algorithm (brnn). dendroTools provides the opportunity to use daily climate data and robust nonlinear functions for the analysis of climate-growth relationships. Models should thus be better adapted to the real (continuous) growth of trees and should gain in predictive capabilities. The dendroTools R package is freely available in the CRAN repository. The functionality of the package is demonstrated on two examples, one using a mean vessel area (MVA) chronology and one a traditional tree-ring width (TRW).
    Source: Dendrochronologia. - ISSN 1125-7865 (Vol. 48, Apr. 2018, str. 32-39)
    Type of material - article, component part
    Publish date - 2018
    Language - english
    COBISS.SI-ID - 4995238

    Link(s):

    https://doi.org/10.1016/j.dendro.2018.01.005
    http://dirros.openscience.si/IzpisGradiva.php?id=8217
    DiRROS - Digital repository of Slovenian research organizations
    DOI

source: Dendrochronologia. - ISSN 1125-7865 (Vol. 48, Apr. 2018, str. 32-39)
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