#' Generate a configuration matrix
#'
#' genmodel runs 4ti2's genmodel program to compute the configuration matrix A
#' corresponding to graphical statistical models given by a simplicial complex
#' and levels on the nodes.
#'
#' @param varlvls a vector containing the number of levels of each variable
#' @param facets the facets generating the hierarchical model, a list of vectors
#' of variable indices
#' @param dir Directory to place the files in, without an ending /
#' @param quiet If FALSE, messages the 4ti2 output
#' @param shell Messages the shell code used to do the computation
#' @param ... Additional arguments to pass to the function
#' @return The configuration matrix of the model provided
#' @export
#' @examples
#'
#' if (has_4ti2()) {
#'
#' varlvls <- rep(2, 2)
#' facets <- list(1, 2)
#' genmodel(varlvls, facets)
#' genmodel(varlvls, facets, quiet = FALSE)
#'
#' varlvls <- rep(3, 3)
#' facets <- list(1:2, 2:3, c(3,1))
#' genmodel(varlvls, facets)
#'
#' # compare this to algstat's hmat function
#'
#' }
#'
genmodel <- function(varlvls, facets, dir = tempdir(), quiet = TRUE,
shell = FALSE, ...
){
if (!has_4ti2()) missing_4ti2_stop()
## compute other args
opts <- as.list(match.call(expand.dots = FALSE))[["..."]]
if (is.null(opts)) {
opts <- ""
} else {
opts <- str_c("-", names(opts), "", unlist(opts))
opts <- str_c(opts, collapse = " ")
}
## compute/write 4ti2 code file
####################################
## format varlvls
formatted_varlvls <- str_sub(format_latte(t(varlvls)), 3)
## format simplices
formatted_facets <- vapply(
facets,
function(v) paste(length(v), paste(v, collapse = " ")),
character(1)
)
formatted_facets <- paste(
length(facets),
paste(formatted_facets, collapse = "\n"),
sep = "\n"
)
## bring the two together
code <- paste(formatted_varlvls, formatted_facets, sep = "\n")
## make dir to put 4ti2 files in (within the tempdir) timestamped
dir.create(scratch_dir <- file.path(dir, time_stamp()))
## make 4ti2 file
writeLines(code, con = file.path(scratch_dir, "PROJECT.mod"))
## move to dir and run 4it2 genmodel
####################################
## switch to temporary directory
user_working_directory <- getwd()
setwd(scratch_dir); on.exit(setwd(user_working_directory), add = TRUE)
## run 4ti2
if (is_mac() || is_unix()) {
system2(
file.path(get_4ti2_path(), "genmodel"),
paste(opts, file.path(scratch_dir, "PROJECT")),
stdout = "genmodel_out",
stderr = "genmodel_err"
)
# generate shell code
shell_code <- glue(
"{file.path(get_4ti2_path(), 'genmodel')} {paste(opts, file.path(scratch_dir, 'PROJECT'))} > genmodel_out 2> genmodel_err"
)
if(shell) message(shell_code)
} else if (is_win()) {
matFile <- file.path(scratch_dir, "PROJECT")
matFile <- chartr("\\", "/", matFile)
matFile <- str_c("/cygdrive/c", str_sub(matFile, 3))
system2(
"cmd.exe",
glue("/c env.exe {file.path(get_4ti2_path(), 'genmodel')} {opts} {matFile}"),
stdout = "genmodel_out",
stderr = "genmodel_err"
)
# generate shell code
shell_code <- glue(
"cmd.exe /c env.exe {file.path(get_4ti2_path(), 'genmodel')} {opts} {matFile} > genmodel_out 2> genmodel_err"
)
if(shell) message(shell_code)
}
## print output, if desired
if(!quiet) message(paste0(readLines("genmodel_out"), "\n"))
std_err <- readLines("genmodel_err")
if(any(std_err != "")) warning(str_c(std_err, collapse = "\n"), call. = FALSE)
## read and return
read.latte(paste0("PROJECT", ".mat"))
}
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