Basic data operations in SPSS - ISS - University of Leeds

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Basic data operations in SPSS for Windows 17 Version 6 (November 2009) Activity 7.5 Use the Variable View window to define value labels for incrange as follows: Code Value label 1 Legacy Dialogs …Bar on the variable incrange. Your graph should resemble Figure 22. Figure 22: Bar chart of the variable incrange Figure 23 shows the SPSS commands used to perform the transformation. RECODE income (Lowest thru 10000=1) (10000 thru 20000=2) (20000 thru 30000=3) (30000 thru 40000=4) (40000 thru 50000=5) (50000 thru 60000=6) (60000 thru Highest=7) INTO incrange . VARIABLE LABELS incrange 'Income Range'. EXECUTE . Figure 23: RECODE into ‘Different Variable’ Information Systems Services Page 20 of36 Version 4.1 (December 2006) tut113_vn17nov2009.doc}
Basic data operations in SPSS for Windows 17 Version 6 (November 2009) Task 8 Performing an automatic recode Objective To recode a block of data in order to group some categories together. Comment Categorical variables may be coded using alphanumeric codes or numeric codes. For example, a variable such as gender may be coded using either ‘F’ and ‘M’ or numeric codes 1 and 2. For the purpose of obtaining descriptive statistics, the choice of coding would not usually be critical. However, some of the statistical procedures for modelling categorical data, such as the loglinear models procedure, require that categorical data be encoded using numerical codes. Whilst Recode could be used to change each alphanumeric code into a numeric code, this could be a tedious process if many values required re-coding. Instead, the Automatic Recode facility can be used. Problem In the data file census.sav, the variable gender is coded using ‘f’ and ‘m’. To change these into numeric codes, we need to create a new variable which is numeric (SPSS does not let you recode into the same variable and change the type of the variable). Activity 8.1 From the Transform menu select Automatic Recode. Activity 8.2 Select Respondent’s sex [gender] from the list of variables and transfer it to the Variable -> New Name box. Activity 8.3 Enter sex in the box below and click on the button. The completed dialog box should resemble Figure 24 below. Figure 24: Automatic recode of gender Activity 8.4 Click and inspect the output at the bottom of the output window. SPSS produces a summary table in the output window (similar to that shown in Figure 25) showing the old and new codes. Figure 25: Summary of automatic recode Information Systems Services Page 21 of36 Version 4.1 (December 2006) tut113_vn17nov2009.doc}
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Basic data operations in SPSS - ISS - University of Leeds

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