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[R] maintenance Apr 2017 (#2237)

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* [R] make sure things work for a single split model; fixes #2191

* [R] add option use_int_id to xgb.model.dt.tree

* [R] add example of exporting tree plot to a file

* [R] set save_period = NULL as default in xgboost() to be the same as in xgb.train; fixes #2182

* [R] it's a good practice after CRAN releases to bump up package version in dev

* [R] allow xgb.DMatrix construction from integer dense matrices

* [R] xgb.DMatrix: silent parameter; improve documentation

* [R] xgb.model.dt.tree code style changes

* [R] update NEWS with parameter changes

* [R] code safety & style; handle non-strict matrix and inherited classes of input and model; fixes #2242

* [R] change to x.y.z.p R-package versioning scheme and set version to 0.6.4.3

* [R] add an R package versioning section to the contributors guide

* [R] R-package/README.md: clean up the redundant old installation instructions, link the contributors guide
This commit is contained in:
Vadim Khotilovich
2017-05-02 00:51:34 -05:00
committed by Tong He
parent d769b6bcb5
commit a375ad2822
29 changed files with 351 additions and 246 deletions
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22
R-package/R/xgb.plot.tree.R
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@@ -11,7 +11,7 @@
#' @param plot_width the width of the diagram in pixels.
#' @param plot_height the height of the diagram in pixels.
#' @param render a logical flag for whether the graph should be rendered (see Value).
#' @param show_node_id a logical flag for whether to include node id's in the graph.
#' @param show_node_id a logical flag for whether to show node id's in the graph.
#' @param ... currently not used.
#'
#' @details
@@ -53,17 +53,25 @@
#' bst <- xgboost(data = agaricus.train$data, label = agaricus.train$label, max_depth = 3,
#' eta = 1, nthread = 2, nrounds = 2,objective = "binary:logistic")
#' # plot all the trees
#' xgb.plot.tree(feature_names = colnames(agaricus.train$data), model = bst)
#' # plot only the first tree and include the node ID:
#' xgb.plot.tree(feature_names = colnames(agaricus.train$data), model = bst,
#' trees = 0, show_node_id = TRUE)
#' xgb.plot.tree(model = bst)
#' # plot only the first tree and display the node ID:
#' xgb.plot.tree(model = bst, trees = 0, show_node_id = TRUE)
#'
#' \dontrun{
#' # Below is an example of how to save this plot to a file.
#' # Note that for `export_graph` to work, the DiagrammeRsvg and rsvg packages must also be installed.
#' library(DiagrammeR)
#' gr <- xgb.plot.tree(model=bst, trees=0:1, render=FALSE)
#' export_graph(gr, 'tree.pdf', width=1500, height=1900)
#' export_graph(gr, 'tree.png', width=1500, height=1900)
#' }
#'
#' @export
xgb.plot.tree <- function(feature_names = NULL, model = NULL, trees = NULL, plot_width = NULL, plot_height = NULL,
render = TRUE, show_node_id = FALSE, ...){
check.deprecation(...)
if (class(model) != "xgb.Booster") {
stop("model: Has to be an object of class xgb.Booster model generaged by the xgb.train function.")
if (!inherits(model, "xgb.Booster")) {
stop("model: Has to be an object of class xgb.Booster")
}
if (!requireNamespace("DiagrammeR", quietly = TRUE)) {