# Copyright 2018 Patrick O. Perry.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
reorder.dataset <- function(x, ...)
{
x <- as.dataset(x)
i <- scopeQuoted.dataset(x, substitute(list(...)), parent.frame())
if (length(i) == 0) {
return(x)
}
for (j in seq_along(i)) {
i[[j]] <- xtfrm.dataset(i[[j]])
}
names <- names(i)
if (!is.null(names)) {
if (!all(names %in% c("asc", "desc", ""))) {
stop("named arguments must be 'asc' or 'desc'")
}
desc <- (names == "desc")
for (j in seq_along(i)) {
if (desc[[j]]) {
i[[j]] <- -i[[j]]
}
}
}
o <- do.call(order, i)
x[o, ]
}
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