Which command do you use to create a hole in an object?

Suppose we would like to extract positive and negative itemsets from a data set that contains d items.

(a) Consider an approach where we introduce a new variable to represent each negative item. With this approach, the number of items grows from d to 2d. What is the total size of the itemset lattice, assuming that an itemset may contain both positive and negative items of the same variable? (b) Assume that an itemset must contain positive or negative items of dif- ferent variables. For example, the itemset {a, a, b, c} is invalid because it contains both positive and negative items for variable a. What is the total size of the itemset lattice?

Explain three schemes that you could use to have a function “return” two data items to the calling function. Note: you can’t use global variables.

What will be an ideal response?