#' @name FCMm
#'
#' @title Fuzzy Cluster Method Based on the Optimized m Value (Fuzzifier)
#'
#' @description
#' \code{FCMm} is a package for fuzzy clustering water spectra (or called water color).
#' Given that the most of water color spectra data sets are considered as the high dimensional
#' set, the advantage of this method is making Fuzzy Cluster Method (FCM) assign the membership (sum as 1) harder.
#' Then, it ensures that the desired water types are restricted to their belongings (not too soft). It is
#' possible to cluster the harm algal bloom water type which can not be produced by FCM with \code{m=2}.
#'
#' \itemize{
#' \item If you want to cluster your own data sets, it provides an improved Fuzzy Cluster
#' Method (FCMm) by optimizing the fuzzifier value (default but not good being 2). See \link{FCM.new}.
#' \item You can also use the built-in centroids of typical inland waters produced by Bi et al. (2019)
#' and can simply obtain the Chlorophyll-a concentration by blending three algorithms with
#' relatively low bias. See \link{apply_FCM_m} and \link{FCM_m_Chla_estimation}.
#' \item More than ten algorithms are supported for estimating Chla concentration by remote sensing of
#' reflectance. See \link{run_all_Chla_algorithms}.
#' \item For the sustainable development of algorithm blending, we have also designed a bootstraping assessment
#' method to find the optimal algorithm for each type of waters. See \link{Scoring_system}.
#' \item It supports the processing of raster or image data, and can use built-in or user-defined centroids.
#' See \link{apply_to_image}.
#' \item It also includes several data sets about water color spectra and corresponding water quality
#' parameters and a testing image raster (see help documents for details).
#' \item Please see NEWS to get changes in each version.
#' }
#'
#' @seealso Useful vignettes:
#' \itemize{
#' \item \code{vignette('Builtin_centrodis')}
#' \item \code{vignette('Cluster_new_data')}
#' \item \code{vignette('Assessment')}
#' }
#'
#' @docType package
#'
#' @references
#' \itemize{
#' \item Bi S, Li Y, Xu J, et al. Optical classification of inland waters based on
#' an improved Fuzzy C-Means method[J]. Optics Express, 2019, 27(24): 34838-34856.
#' \item Jackson T, Sathyendranath S, Mélin F. An improved optical classification
#' scheme for the Ocean Colour Essential Climate Variable and its applications[J].
#' Remote Sensing of Environment, 2017, 203: 152-161.
#' \item Moore T S, Dowell M D, Bradt S, et al. An optical water type framework for
#' selecting and blending retrievals from bio-optical algorithms in lakes and coastal
#' waters[J]. Remote sensing of environment, 2014, 143: 97-111.
#' \item Spyrakos E, O'Donnell R, Hunter P D, et al. Optical types of inland and coastal
#' waters[J]. Limnology and Oceanography, 2018, 63(2): 846-870.
#' \item Dembele D. Multi-objective optimization for clustering 3-way gene expression
#' data[J]. Advances in Data Analysis and Classification, 2008, 2(3): 211-225.
#' }
"_PACKAGE"
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