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Download IBM SPSS Statistics 19 Core System User's Guide
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125 Data preparation If a missing value code conflicts with one of the binned category values for the new variable, the missing value code for the new variable is recoded to a nonconflicting value by adding 100 to the highest binned category value. For example, if a value of 1 is defined as user-missing for the source variable and the new variable will have six binned categories, any cases with a value of 1 for the source variable will have a value of 106 for the new variable, and 106 will be defined as user-missing. If the user-missing value for the source variable had a defined value label, that label will be retained as the value label for the recoded value of the new variable. Note: If the source variable has a defined range of user-missing values of the form LO-n, where n is a positive number, the corresponding user-missing values for the new variable will be negative numbers.
