{ "_id": "6a104802acfb0bcc41c9f175", "Package": "phytoclass", "Title": "Estimate Chla Concentrations of Phytoplankton Groups", "Version": "3.0.0", "Authors@R": "c(person(\n\"Alexander\", \"Hayward\", role = c(\"aut\", \"cre\", \"cph\"), email = \"phytoclass@outlook.com\"\n), person(\ngiven=\"Tylar\", family=\"Murray\", role = c(\"aut\")\n), person(\ngiven=\"Sebastian\", family=\"Di Geronimo\", role = c(\"aut\")\n), person(\ngiven = \"Mohd Aasim Maqsood\", family = \"Khan\", role = c(\"aut\")\n), person(\ngiven=\"Andy\", family=\"McKenzie\", role = c(\"aut\")\n))", "Description": "Determine the chlorophyll a (Chl a) concentrations of\ndifferent phytoplankton groups based on their pigment\nbiomarkers. The method uses non-negative matrix factorisation\nand simulated annealing to minimise error between the observed\nand estimated values of pigment concentrations (Hayward et al.\n(2023) ). The approach is similar to\nthe widely used 'CHEMTAX' program (Mackey et al. 1996)\n, but is more straightforward,\naccurate, and not reliant on initial guesses for the pigment to\nChl a ratios for phytoplankton groups.", "License": "MIT + file LICENSE", "Encoding": "UTF-8", "Roxygen": "list(markdown = TRUE)", "RoxygenNote": "7.3.2", "LazyData": "true", "VignetteBuilder": "knitr", "URL": "https://github.com/phytoclass/phytoclass/", "BugReports": "https://github.com/phytoclass/phytoclass/issues/", "Config/testthat/edition": "3", "Config/pak/sysreqs": "make libicu-dev", "Repository": "https://phytoclass.r-universe.dev", "Date/Publication": "2026-04-10 17:37:06 UTC", "RemoteUrl": "https://github.com/phytoclass/phytoclass", "RemoteRef": "HEAD", "RemoteSha": "3c2df0d2eaabede0d70ce065cf813addcde4b7e9", "NeedsCompilation": "no", "Packaged": { "Date": "2026-05-10 09:20:22 UTC", "User": "root" }, "Author": "Alexander Hayward [aut, cre, cph],\nTylar Murray [aut],\nSebastian Di Geronimo 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