suggest not import igraph

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: dodgr
 Title: Distances on Directed Graphs
-Version: 0.2.5.009
+Version: 0.2.5.010
 Authors@R: c(
     person("Mark", "Padgham", email="[email protected]", role=c("aut", "cre")),
     person("Andreas", "Petutschnig", role="aut"),
@@ -21,7 +21,6 @@ License: GPL-3
 Imports:
     callr,
     digest,
-    igraph,
     magrittr,
     methods,
     osmdata,
@@ -31,6 +30,7 @@ Suggests:
     dplyr,
     geodist,
     ggplot2,
+    igraph,
     igraphdata,
     jsonlite,
     knitr,

R/centrality.R

@@ -26,6 +26,11 @@
 #' graph <- dodgr_contract_graph (graph_full)
 #' graph <- dodgr_centrality (graph)
 #' # 'graph' is then the contracted graph with an additional 'centrality' column
+#' # Same calculation via 'igraph':
+#' igr <- dodgr_to_igraph (graph)
+#' library (igraph)
+#' cent <- edge_betweenness (igr)
+#' identical (cent, graph$centrality) # TRUE
 #' # Values of centrality between all junctions in the contracted graph can then
 #' # be mapped back onto the original full network by "uncontracting":
 #' graph_full <- dodgr_uncontract_graph (graph)

R/compare-heaps.R

@@ -25,6 +25,7 @@
 compare_heaps <- function(graph, nverts = 100, replications = 2)
 {
     requireNamespace ("rbenchmark")
+    requireNamespace ("igraph")
 
     if (is.numeric (nverts))
         graph <- dodgr_sample (graph, nverts = nverts)

R/graph-conversion.R

@@ -119,6 +119,7 @@ dodgr_to_sfc <- function (graph)
 #' graphi <- dodgr_to_igraph (graph)
 dodgr_to_igraph <- function (graph, weight_column = "d")
 {
+    requireNamespace ("igraph")
     graph <- tbl_to_df (graph)
     if (!weight_column %in% names (graph))
         stop ("graph contains no column named '", weight_column, "'")
@@ -161,6 +162,7 @@ dodgr_to_igraph <- function (graph, weight_column = "d")
 #' identical (graph2, graph) # FALSE
 igraph_to_dodgr <- function (graph)
 {
+    requireNamespace ("igraph")
     ei <- igraph::edge_attr (graph)
     vi <- igraph::vertex_attr (graph)
     index <- grep ("^lon|^lat|lon$|lat$|^x|^y|x$|y$", names (ei))
@@ -220,9 +222,8 @@ convert_col <- function (x, n = 3)
 #' grapht <- dodgr_to_tidygraph (graph)
 dodgr_to_tidygraph <- function (graph)
 {
-    if (!requireNamespace ("tidygraph"))
-        stop (paste0 ("dodgr_to_tidygraph requires the ",       # nocov
-                      "tidygraph package to be installed."))    # nocov
+    requireNamespace ("igraph")
+    requireNamespace ("tidygraph")
 
     dodgr_to_igraph (graph) %>%
         tidygraph::as_tbl_graph ()

codemeta.json

@@ -10,7 +10,7 @@
   "codeRepository": "https://github.com/ATFutures/dodgr",
   "issueTracker": "https://github.com/ATFutures/dodgr/issues",
   "license": "https://spdx.org/licenses/GPL-3.0",
-  "version": "0.2.5.9",
+  "version": "0.2.5.10",
   "programmingLanguage": {
     "@type": "ComputerLanguage",
     "name": "R",
@@ -107,6 +107,18 @@
       },
       "sameAs": "https://CRAN.R-project.org/package=ggplot2"
     },
+    {
+      "@type": "SoftwareApplication",
+      "identifier": "igraph",
+      "name": "igraph",
+      "provider": {
+        "@id": "https://cran.r-project.org",
+        "@type": "Organization",
+        "name": "Comprehensive R Archive Network (CRAN)",
+        "url": "https://cran.r-project.org"
+      },
+      "sameAs": "https://CRAN.R-project.org/package=igraph"
+    },
     {
       "@type": "SoftwareApplication",
       "identifier": "igraphdata",
@@ -283,18 +295,6 @@
       },
       "sameAs": "https://CRAN.R-project.org/package=digest"
     },
-    {
-      "@type": "SoftwareApplication",
-      "identifier": "igraph",
-      "name": "igraph",
-      "provider": {
-        "@id": "https://cran.r-project.org",
-        "@type": "Organization",
-        "name": "Comprehensive R Archive Network (CRAN)",
-        "url": "https://cran.r-project.org"
-      },
-      "sameAs": "https://CRAN.R-project.org/package=igraph"
-    },
     {
       "@type": "SoftwareApplication",
       "identifier": "magrittr",
@@ -392,5 +392,5 @@
     }
   ],
   "relatedLink": "https://CRAN.R-project.org/package=dodgr",
-  "fileSize": "642.845KB"
+  "fileSize": "376.773KB"
 }