r - How to create bipartite network in igraph with duplicate vertices names -

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i want create bipartite network connects nfl teams colleges drafted players from. have 1955 rows in data - 1 row each player. have 2 csv files (edge.csv , node.csv). edge data set such:

team      college arizona   alabama arizona   alabama arizona   arizona st. arizona   arizona st. arizona   auburn

and node data set such:

team     player   no.   type arizona         1     true arizona  b        2     true arizona  c        3     true arizona  d        4     true arizona  e        5     true

the other variables in node data age, position, games played, games started, weight, height, birthdate, pro years played, team drafted, round drafted, overall pick, year drafted.

and added colleges team column starting @ row 1956 , filled in type false, other variables across na.

when try convert these files graph in rstudio, keep getting error:

error in graph.data.frame(edge.df, node.df, directed = false) :  duplicate vertex names

which assume because names of teams , colleges repeat, network, unavoidable , entire purpose of looking @ data. there way fix this?


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