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--- r:igraph [2016/12/08 10:07] – hkimscil
+++ r:igraph [2018/01/11 09:10] (current) – hkimscil
@@ Line 3: / Line 3: @@
 [[https://rstudio-pubs-static.s3.amazonaws.com/74248_3bd99f966ed94a91b36d39d8f21e3dc3.html|igraph tutorial]]
 [[http://michael.hahsler.net/SMU/LearnROnYourOwn/code/igraph.html|Examples for the igraph package]]
+nodes (vertex)
+edges (lines)
+  * freight schedule
+  * friendship
+  * contact
+  * relationship
+social network
+{{http://s3.amazonaws.com/assets.datacamp.com/production/course_4474/datasets/networkimg.png?280}}
+adjency matrix
+{{http://s3.amazonaws.com/assets.datacamp.com/production/course_4474/datasets/networkmat.png?240}}
+edge list - economical way to store data
+{{http://s3.amazonaws.com/assets.datacamp.com/production/course_4474/datasets/networkedg.png?85}}
+<code>library(igraph)
+# df = data frame data
+g <- graph.edgelist(as.matrix(df), directed = FALSE)
+</code>