'How can I use subsets to separate stocks into groups in my R code as a constraint for a stock portfolio? Any thoughts would be much appreciated
assets <- c("1", "2", "3", "4")
port_spec <- add.constraint(portfolio = port_spec, type = "group", groups = list(c(1, 2, 3), 4), group_labels = c("Grupa A", "Grupo B"), group_pos = c(2,1))
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