Hi Experts,
I have a dataset of 3 columns:
customer.name product cost
John Toothpaste 30
Mike Toothpaste 45
Peter Toothpaste 40
And I have a function of cost whereby
cost = 3.40 + (1.20 * no.of.orders^2)
I want to do a backward calculation for each records (each customer) to
find his no.of.orders and create a new column named "no.of.orders" in that
dataset but I don't know how to do.
Please help me.
Thank you everyone,
Prakasit
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