Definition
Calculates the change
Returns
Returns the change in the variable over t periods.
Example
@chg(v1040, -1q)
Where Cost of Goods Sold (v1040) is:
v1040
1998
1999
1Q00
2Q00
3Q00
4Q00
Cost of Goods Sold
15
20
4
5
6
7
In the second quarter of 2000 the equation returns:
1, (5- 4)