Allow to create a Zip archive of all results in CSV format

DESCRIPTION

@@ -30,7 +30,8 @@ Imports:
     graphics,
     grDevices,
     khroma (>= 1.14.0),
-    methods
+    methods,
+    utils
 Suggests: 
     knitr,
     markdown,
@@ -58,6 +59,7 @@ Collate:
     'dimensio-deprecated.R'
     'dimensio-internal.R'
     'dimensio-package.R'
+    'export.R'
     'get_contributions.R'
     'get_coordinates.R'
     'get_correlations.R'

NAMESPACE

@@ -43,6 +43,7 @@ exportMethods(cdt)
 exportMethods(colnames)
 exportMethods(dim)
 exportMethods(dimnames)
+exportMethods(export)
 exportMethods(get_contributions)
 exportMethods(get_coordinates)
 exportMethods(get_correlations)

NEWS.md

@@ -1,4 +1,6 @@
 # dimensio 0.9.0.9000
+## New classes and methods
+* Add `export()` to create a Zip archive of all results in CSV format.
 
 # dimensio 0.9.0
 ## New classes and methods

R/AllGenerics.R

@@ -290,6 +290,24 @@ NULL
 NULL
 
 # Results ======================================================================
+#' Export Results
+#'
+#' Creates a Zip archive of all results in CSV format.
+#' @param object A [`CA-class`], [`MCA-class`] or [`PCA-class`] object.
+#' @param file A [`character`] string specifying the pathname of the zip file.
+#' @param flags A [`character`] string of flags (see [utils::zip()]).
+#' @param ... Currently not used.
+#' @example inst/examples/ex-export.R
+#' @seealso [utils::write.csv()], [utils::zip()]
+#' @author N. Frerebeau
+#' @docType methods
+#' @family getters
+#' @aliases export-method
+setGeneric(
+  name = "export",
+  def = function(object, ...) standardGeneric("export")
+)
+
 ### Data -----------------------------------------------------------------------
 #' Get Original Data
 #'

R/export.R

@@ -0,0 +1,77 @@
+# EXPORT
+#' @include AllGenerics.R
+NULL
+
+# The -r9X flags specify that the zip command should recursively search
+# sub-directories, use maximum compression, and remove depreciated file fields.
+# The -j flag allows the file names to be stored rather than the full file path.
+#' @export
+#' @rdname export
+#' @aliases export,MultivariateAnalysis-method
+setMethod(
+  f = "export",
+  signature = c(object = "MultivariateAnalysis"),
+  definition = function(object, file, flags = "-r9Xj", ...) {
+    ## Create temporary directory
+    dir_path <- tempfile(pattern = "export_")
+    dir.create(path = dir_path)
+    on.exit(unlink(x = dir_path))
+
+    ## Write results
+    utils::write.csv(
+      x = get_data(object),
+      file = make_file_name(dir_path, "data")
+    )
+    utils::write.csv(
+      x = get_eigenvalues(object),
+      file = make_file_name(dir_path, "eigenvalues")
+    )
+    export_results(object, path = dir_path, margin = 1)
+    export_results(object, path = dir_path, margin = 2)
+
+    ## Zip
+    status <- utils::zip(zipfile = file, files = dir_path, flags = flags, ...)
+    invisible(status)
+  }
+)
+
+export_results <- function(object, path, margin, sup_name = ".sup") {
+  ## Coordinates
+  coords <- get_coordinates(
+    x = object,
+    margin = margin,
+    principal = TRUE,
+    sup_name = sup_name
+  )
+
+  ## Contributions
+  contrib <- get_contributions(
+    x = object,
+    margin = margin
+  )
+
+  ## cos2
+  cos2 <- get_cos2(
+    x = object,
+    margin = margin,
+    sup_name = sup_name
+  )
+
+  ## Write
+  utils::write.csv(x = coords, file = make_file_name(path, "coordinates", margin))
+  utils::write.csv(x = contrib, file = make_file_name(path, "contributions", margin))
+  utils::write.csv(x = cos2, file = make_file_name(path, "cos2", margin))
+
+  invisible(NULL)
+}
+
+make_file_name <- function(path, name, margin = NULL) {
+  prefix <- ""
+  if (!is.null(margin) && margin == 1) prefix <- "row_"
+  if (!is.null(margin) && margin == 2) prefix <- "col_"
+
+  file_name <- paste0(prefix, name, ".csv")
+  file_path <- file.path(path, file_name)
+
+  file_path
+}

inst/examples/ex-export.R

@@ -0,0 +1,10 @@
+\dontrun{
+## Load data
+data("iris")
+
+## Compute principal components analysis
+X <- pca(iris)
+
+## Export results
+export(X, file = "results.zip")
+}