mat statement

mat array.var = exp 
mat array.var1 = mat array.var2

Array variables must be defined in a dim, common, or file statement.

Copies one array into another. The number of elements in array.var1 must be greater than or equal to the number of elements in array.var2. It is possible to assign a two-dimensional array to a single-dimensional array and conversely.

Dim array(5)
qty = 10
mat array = qty
 
dim one(4,1)
mat one = 1
dim two(2,2)
mat two = mat one

This sets every array element of customer.item to null.

mat customer.item = ""

This sets every array entry of customer.item.history to its corresponding entry in customer.item.

mat customer.item.history = mat customer.item

This example assigns all of the elements in the two dimensional array, a into the one dimensional array, b. The rows are filled before the columns, therefore a(2,1) = 2.

dim a(10,2)
dim b(20)
mat b = 1
b(3) = 2
mat a = mat b