Download Jmp User Guide

324 Formula Editor Chapter 9
Examples and Tutorials
Figure 9.40 Local Variables in a Formula
Note: You can also create local variables using the button on the on-screen keypad. Clicking this
button creates a local variable with a default name in an expression and places a semicolon after it. The
default name is t1, and additional local variables are named t2, t3, and so forth. You can change these
default names by double-clicking and editing the name. However, you must be careful to rename each
instance of the variable to avoid errors.
Using the Munger Function
The following examples show uses of the Munger function. In these examples, assume that there is a
character column of names with “Veronica Layman” as one of its values. To simplify the examples, the
literal name “Veronica Layman” is the search string instead of a column name.
See “Adding Character Arguments and Returning Character Strings,” p. 300, for instructions on how
to incorporate Character functions, such as Munger, into a formula.
Inserting Characters
This Munger example finds the blank between the first and last name, and inserts the middle initial
“J.” The formula Munger("Veronica Layman", 1, " ", " J. ") inserts the middle initial J., and evaluates as
Veronica J. Layman.
Double quotes are required by the Munger function for literal strings, including strings that consist of
a blank or when leading or trailing blanks are part of a string.
Deleting Characters
To delete one or more characters from a string
1 Designate the characters to delete as the Find string in the Munger function.
2 Enter an empty Replace string: two quotation marks with nothing between them.
For example, the function, Munger("Veronica Layman", 1, "onic", "") removes the “onic” from
Veronica and evaluates as Vera Layman.
Note: A Replace field with a null (no value) string enclosed in quotation marks is different from a
Replace field with no value. If you delete the Replace string altogether, Munger shows the argument
name (“Replace”) in the formula editor window and behaves as if that optional argument doesn't exist.