arulesViz "graph" plot doesn't show the connections
I'm using the arulesViz library to plot some graphs about recommendation systems.
I have some rules and I want to plot them in a graph plot.
plot(regras, method = "graph", control = list(type = "itens"))
This is what I got:
Solution
This appears to be a bug in arulesViz. However, there is a workaround.
Since you do not provide any data that can be used as an example, I will use a variation of the example from the documentation. Just using the basic plot shows no links like in your question.
data(Groceries)
rules <- apriori(Groceries, parameter=list(support=0.002, confidence=0.8))
plot(rules, method="graph")
However, if you set alpha=1 the links will display.
plot(rules, method="graph", alpha = 1)
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