R/findSupersets.R

# Copyright (c) 2019, Adrian Dusa
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, in whole or in part, are permitted provided that the
# following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * The names of its contributors may NOT be used to endorse or promote products
#       derived from this software without specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL ADRIAN DUSA BE LIABLE FOR ANY
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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`findSupersets` <-
function (input, noflevels, ...) {
    other.args <- list(...)
        if ("input.combs" %in% names(other.args)) {
            input <- other.args$input.combs
        }
    if (!is.matrix(input)) {
        if (!is.vector(input)) {
            cat("\n")
            stop("input must be either an solution-space matrix or a vector of row numbers.\n\n",
                 call. = FALSE)
        }
        else {
            if (any(input > prod(noflevels))) {
                cat("\n")
                stop(paste("Some line numbers do not belong in the solution-space for",
                           length(noflevels), "causal conditions.\n\n"), call. = FALSE)
            }
            input <- getRow(input, noflevels)
        }
    }
    mbase <- rev(c(1, cumprod(rev(noflevels))))[-1]
    allcombn <- t(createMatrix(rep(2, length(noflevels)))[-1, ])
    primes <- sort.int(unique(as.vector(apply(input, 1, function(x) (x*mbase) %*% allcombn + 1))))
    if (primes[1] == 1) {
        return(primes[-1])
    }
    else {
        return(primes)
    }
}

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QCA documentation built on May 2, 2019, 4:47 p.m.