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## .SciPy2R.R: Conversion of SciPy sparse matrix to R
##
## Copyright (C) 2017 - 2020 Binxiang Ni and Dirk Eddelbuettel
##
## This file is part of RcppArmadillo.
##
## RcppArmadillo is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 2 of the License, or
## (at your option) any later version.
##
## RcppArmadillo is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with RcppArmadillo. If not, see <http://www.gnu.org/licenses/>.
.SciPy2R <- function(spmat) { # #nocov start
.Deprecated("This function is no longer needed as 'reticulate' now converts from 'scipy'.",
package="reticulate")
if (!requireNamespace("reticulate", quietly=TRUE)) {
stop("You must install the 'reticulate' package (and have SciPy).", call.=FALSE)
}
type <- spmat$getformat()
shape <- unlist(spmat$shape)
data <- as.vector(reticulate::py_get_attr(spmat, "data"))
# Since CSC Matrix from SciPy has been automatically converted to dgCMatrix,
# the conversion for csc matrix is no longer needed.
# if (type == "csc") {
# indices <- as.vector(reticulate::py_get_attr(spmat, "indices"))
# indptr <- as.vector(reticulate::py_get_attr(spmat, "indptr"))
# res <- new("dgCMatrix", i = indices, p = indptr, x = data, Dim = shape)
# }
if (type == "coo") {
row <- as.vector(reticulate::py_get_attr(spmat, "row"))
col <- as.vector(reticulate::py_get_attr(spmat, "col"))
res <- new("dgTMatrix", i = row, j = col, x = data, Dim = shape)
} else if (type == "csr") {
indices <- as.vector(reticulate::py_get_attr(spmat, "indices"))
indptr <- as.vector(reticulate::py_get_attr(spmat, "indptr"))
res <- new("dgRMatrix", j = indices, p = indptr, x = data, Dim = shape)
} else {
stop("Only CSC, COO and CSR matrices from SciPy are supported.", call.=FALSE)
}
return(res)
} # #nocov end
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