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Basic data operations in SPSS - ISS - University of Leeds

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<strong>Basic</strong> <strong>data</strong> <strong>operations</strong> <strong>in</strong> <strong>SPSS</strong> for W<strong>in</strong>dows 17<br />

Version 6 (November 2009)<br />

Activity 6.3 Def<strong>in</strong>e old and new values.<br />

Figure 14: Recode <strong>in</strong>to Same Variables dialog<br />

(i) In the area on the left labelled Old Value, enter the value 13 <strong>in</strong>to the box labelled Value.<br />

(ii) In the area labelled New Value, select .<br />

(iii) Click on . The value 13 will disappear from the box on the left hand side and the<br />

mapp<strong>in</strong>g between the old and the new value will appear <strong>in</strong> the large box on the right<br />

hand side, as shown <strong>in</strong> Figure 15.<br />

Figure 15: Recode show<strong>in</strong>g mapp<strong>in</strong>g <strong>of</strong> old value to new value<br />

Note the use <strong>of</strong> the keyword SYSMIS. This is a reserved name <strong>in</strong> <strong>SPSS</strong> and is used to<br />

represent the value <strong>of</strong> the <strong>SPSS</strong> system miss<strong>in</strong>g value.<br />

(iv) Click .<br />

Activity 6.4 Click to execute the re-code operation.<br />

Figure 16 shows the result <strong>of</strong> re-runn<strong>in</strong>g Frequencies on the modified variable.<br />

Information Systems Services Page 16 <strong>of</strong>36<br />

Version 4.1 (December 2006) tut113_vn17nov2009.doc}

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