Recode to date/time values

Recode ranges of values

(Numeric or date/time source data only) Recode each range of numeric or date/time values to one date/time value. For example, you can change all values in the range "1 January" – "31 January" to "January". Complete the following steps to specify the values to recode and the recoded values.

1. For each range of numeric or date/time values, enter the Lower endpoint value, Upper endpoint value, and Recoded value in the table. For example, you can enter the values that are shown in the following table.

   Lower endpoint	Upper endpoint	Recoded value
   0	10	1/2010
   10	20	1/2020
   20	30	1/2030
   30	9999	*

2. For Endpoints to include, indicate how you want the values that you enter in the table to be recoded. For example, if you enter the values that are shown in the preceding table and you select Lower endpoint only, then 0 is recoded as 1/2010, 10 is recoded as 1/2020, and so on.

Recode individual values

Recode individual values to different individual date/time values. For example, you can change each instance of the number 1 to "January" and each instance of the number 2 to "February".

To recode individual values, under Recoded value, enter the new value beside the corresponding Current value.

Recode a single value

Recode one date/time value to a different date/time value. For example, you can change each instance of "January 15" to "January 16". Complete the following steps to specify the value to recode and the recoded value.

1. From Current value, select the value that you want to change.
2. In Recoded value, enter the new value.

Recode least frequent values

Recode the values that occur least frequently to a single value. For example, you can change the values that occur fewer than 5 times to a missing value (denoted by *). Complete the following steps to specify the values to recode and the recoded values.

1. In Recode values into one category that occur less than this number of times, enter a number. For example, if you enter 5, then the values that occur 4 times or fewer are recoded.
2. In Recoded value, enter the new value (for example, enter *).

Recode least frequent percentage

Recode the values that occur least frequently to a single value. For example, you can change the 20% least frequent values to a missing value (denoted by *). Minitab uses the Pareto chart method to determine the values to recode. Minitab orders the values from most frequent to least frequent, then determines the cumulative percentage for each value. When the cumulative percentage surpasses the percentage that you specify, the remaining values are recoded.

Complete the following steps to specify the values to recode and the recoded values.

1. In Recode remaining values into one category after this percent, enter a percentage. For example, if you enter 80, then each unique value after the first 80% of the unique values is recoded.
2. In Recoded value, enter the new value (for example, enter *).