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Weekly and monthly graphs for monitoring crime patterns (SPSS Statistics)

I was recently asked for some code to show how I created the charts in my paper, Tables and Graphs for Monitoring Crime Patterns (Pre-print can be seen here ). I cannot share the data used in the paper, but I can replicate them with some other public data. I will use calls for service...

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STAR JOIN on IBM SPSS Statistics 24 is up to 87% faster

The performance of the STAR JOIN merge procedure was carefully re-evaluated during development of IBM SPSS Statistics 24. After review of the code, a significant improvement was achieved in the procedure’s performance. The Chart below shows the dramatic difference observed following this...

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SPSS Statistics data files can be smaller and faster if saved as uncompressed

When you save a data file in SPSS Statistics as a .SAV file using the File->Save or File->Save As, the file is saved in compressed form. For .SAV files stored compressed, small integers (from −99 to 155) and system missing values are stored in one byte instead of the eight bytes that are...

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Using local Python objects in SPSSINC TRANS – examples with network statistics

When using SPSSINC TRANS, you have a wider array of functions to compute on cases in SPSS. Within the local session, you can create your own python functions within a BEGIN PROGRAM and END PROGRAM block. In SPSSINC TRANS you pass in the values in the current dataset, but you can also create...

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Passing arguments to SPSSINC TRANS (2)

Jon Peck made some great comments on my prior post on passing arguments to the SPSSINC TRANS function. Besides advice on that I should be quoting the argument on the FORMULA statement, he gave examples of how you can use the "TO" argument in both passing variables lists within the python...

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Three-and-a-Half Ways to Skin a Cat

IBM SPSS Statistics contains many tools for data management. This post discusses several different ways to solve an example data management problem using technology from different areas of the product. The purpose of this post is to help you decide where to look when creating a problem...

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