Using JMP - SAS

Chapter 7 Formula Editor 225
Examples and Tutorials
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 does not exist. The
resulting data type can also change from character to numeric, depending on the value of the Find/Length
argument.
Find the Position (Index) of a Value
When the Find/Length field contains characters, Munger behaves like an index function and returns the
numeric position of the first instance of the search string if it exists. For example, Munger("Veronica
Layman", 1, " ") searches for a single blank and finds it in position nine. If the search string is not found,
Munger returns a zero. This use of Munger produces the same result as the Contains function, as shown in
“Character Functions” on page 402 in the “Formula Functions Reference” appendix.
Find a Substring
Munger can extract substrings. For example, to extract only the first name, Munger("Veronica Layman", 1,
8,) starts at position one and reads through position eight. The remaining characters are ignored because the
replace argument is not defined. This yields “Veronica” and produces the same result as the Substring, as
shown in “Character Functions” on page 402 in the “Formula Functions Reference” appendix.
An alternative way to find a substring is with a start value, any negative find value, and a no replace
argument. Munger("Veronica Layman", 9, –1,) returns “Layman”.
Use the Match Conditional Function
This example walks you through using the Match conditional function.
Suppose that you want a Match conditional for the nominal variable Type from the Hot Dogs.jmp sample
data table.
1. In the Formula Editor, select Type from the Table Columns list.
2. Select Conditional from the Functions list.
3. Select Match.
4. Select Add Arguments from Data.
The values are automatically filled in. See Figure 7.12.
Note: Rather than complete step 2 through step 4, hold down the SHIFT key, select Conditional from the
Functions list, and then select Match.