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| SPSS supports numeric and [[SPSSStrings|string]] data. There are several formats on top of numeric data that impact visualization, not storage. These include [[SPSSDatetimes|dates and times]]. | SPSS exposes numeric and string data types. Certain specialized forms of data are handled by formats that impact visualization and export, not storage. The primary example of this is date and time data. |
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| Numeric data is stored as double-precision floating point. Data formats adjust the printed/ exported representation of a data point, often only truncating the value. Adjusting these data formats does not destroy precision. | Numeric data is stored as double-precision floating point. |
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| Given 123.45... | Data formats adjust the visualized/exported representation of a data point, often only truncating the value. Adjusting these data formats does not destroy precision. Given the literal value 123.45... |
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See [[SPSSDatetimes|here]] for more details on date, time, and datetime data. |
SPSS Data Types
SPSS exposes numeric and string data types.
Certain specialized forms of data are handled by formats that impact visualization and export, not storage. The primary example of this is date and time data.
Numeric Data
Numeric data is stored as double-precision floating point.
Data formats adjust the visualized/exported representation of a data point, often only truncating the value. Adjusting these data formats does not destroy precision.
Given the literal value 123.45...
General Format |
Format |
Representation |
Fw |
F8 |
123 |
Fw.d |
F8.1 |
123.4 |
Nw |
N8 |
00000123 |
Nw.d |
N8.1 |
000123.4 |
Date and Time Formats
Format |
Representation |
DATETIME20 |
dd-MMM-yyyy hh:mm:ss |
DATETIME17 |
dd-MMM-yyyy hh:mm |
DATE11 |
dd-MMM-yyyy |
DATE9 |
dd-MMM-yy |
TIME8 |
hh:mm:ss |
TIME5 |
hh:mm |
ADATE10 |
mm/dd/yyyy |
Note that MMM appears as JAN, not 001.
String Data
String data is stored at a fixed length. This length is defined and adjusted through the format; Aw where w is the width.