def self.date_transaction_array(user)
date_transaction_array = []

amount_array = user.transactions.order(“date”).map {|t| (t.amount * t.type.value)}
date_array = user.transactions.order(“date”).map {|t| (t.date.to_datetime.to_i * 1000)}

y = 0
user.transactions.order(“date”).each do |transaction|
inner_array = []
inner_array << date_array[y]
inner_array << amount_array[0..y].sum.to_f
date_transaction_array << inner_array
y = y + 1
end

return date_transaction_array
end

By using a push iteration on the inner_array, this avoided the string designation. The amount_array was performing a "running total" calculation of Money.objects (Money gem, very useful), in addition.

Thanks again! –Tony