Using JMP - SAS

Chapter 7 Formula Editor 223
Examples and Tutorials
8. Click weight again from the column selector list.
It becomes selected in the denominator.
9. Select Col Std Dev from the Statistical list.
The completed formula should look like that in Figure 7.10.
Figure 7.10 Building a Formula
10. Close the Formula Editor by clicking OK.
11. Close the Column Info window by clicking OK.
In the data table, the new Standard Weight column fills with values. When a weight value changes, the
calculated Standard Weight value automatically recalculates.
Use Local Variables in a Formula
Suppose you want to compute the slope in a simple linear regression of y on x using the standard formula
shown in Figure 7.11. One way to do this is to create two local variables, and name them XY and Xsqrd.
(See “Use Local Variables” on page 207.) Then assign them to the numerator and the denominator
calculations of the slope formula. Delimit each assignment with a semicolon, as shown in Figure 7.11.
(Statements in the Formula Editor are actually JSL programming statements. Multiple statements in a
formula must be separated by a semicolons.) The slope computation is simplified to XY divided by Xsqrd.