Basic data operations in SPSS - ISS - University of Leeds
Basic data operations in SPSS - ISS - University of Leeds
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 />
(ii) Hav<strong>in</strong>g selected Arithmetic functions, scroll down the list <strong>of</strong> Functions and Special<br />
Activity 4.6 Click on .<br />
Variables and highlight the RND function. Click on the upward arrow key to select this<br />
function.<br />
(iii) Replace the symbol ?, represent<strong>in</strong>g the argument <strong>of</strong> RND, by the expression (jobtime +<br />
prevexp)/12.<br />
The term jobtime+prevexp represents the total number <strong>of</strong> months worked. Division by 12<br />
converts this <strong>in</strong>to years. The RND function rounds the result to the nearest <strong>in</strong>teger.<br />
On completion <strong>of</strong> the expression, the dialog w<strong>in</strong>dow should resemble Figure 5.<br />
Figure 5: Compute dialog w<strong>in</strong>dow<br />
The result is shown <strong>in</strong> Figure 6, below.<br />
Figure 6: Data Editor show<strong>in</strong>g computed variable workyrs<br />
Note that if miss<strong>in</strong>g values had been present <strong>in</strong> either jobtime or prevexp, the result variable<br />
workyrs would have been assigned the system miss<strong>in</strong>g value.<br />
Figure 7 shows the <strong>SPSS</strong> commands used to perform the transformation.<br />
COMPUTE workyrs = RND((jobtime + prevexp) / 12) .<br />
EXECUTE .<br />
Figure 7: COMPUTE command<br />
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