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PI64972: SPATIAL TEMPORAL PREDICTION WARNING ABOUT AUTOREGRESSIVE LAG ANDTOO MANY LOCATIONS FOR VARIOGRAM BASED PARAMETRIC MODEL

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APAR status

  • Closed as fixed if next.

Error description

  • You work with IBM SPSS Statistics 24 or 23 FixPack 3 and use the
    menu Geospatial Modeling - Spatio Temporal Prediction
    on a Windows 64 bit computer with about 8 GB RAM.
    
    For the Spatio Temporal Prediction Model you use a file with
    several counties but without adding a map, you just context data
    with latitude and longitude for each county within the file.
    
    An example syntax you run is:
    
    SPATIAL MAPSPEC
    /MAPPROJECTION  DISPLAY=SIMPLE
    /DATA  TYPE=DATASET SOURCE=* IDENTIFIER=Context ROLE=CONTEXT
    XCOORDINATE=INTPTLONG
        YCOORDINATE=INTPTLAT COORDSYSTEM=GEOGRAPHIC
    /SPECFILE FILE="*\mapspec.mplan" DISPLAY=YES SAVEDATA=NO.
    
    SPATIAL TEMPORAL PREDICTION
    /MAPSPEC FILE='*\mapspec.mplan'
    /AGGREGATION CONTINUOUS=MEAN ORDINAL=MODE
    /DATASET DATAID=Context TARGET=v1 INPUTS=Rate  TIMEINDEX=dt1
    /TIMEFIELDS INPUTINTERVAL=YEAR INCREMENT=1
    /MODELBUILDING SIGNIFICANCE=0.05 INTERCEPT=YES
    COVARIANCE=VARIOGRAM(2) AUTOREGRESSIONLAG=3
        MISSINGRECORDS=0.05 CONFIDENCEINTERVAL=0.95 UNCERTAINTY=0.05
    /MODELTABLES  SPECIFICATIONS=YES TEMPORALINFO=YES LOCATIONS=NO
    QUALITY=NO EFFECTS=NO
        MEANSTRUCTURE=NO COEFFICIENTS=NO COVARIANCE=YES
    PARAMETRIC=NO
    /MAPOUTPUT TARGETVALUES=YES CORRELATIONS=YES CLUSTERS=YES
    SIMILARITY=0.2 MAXCLUSTERS=75
    /SAVE SCORE=NO.
    
    However, on output Viewer you get this warning below:
    
    Warnings
    "The autoregressive lag for this model is 5. The data must
    contain at least lag+3 consecutive, valid time points for at
    least 3 locations. If there are exactly lag+3 time points and
    the lag value is greater than 3, the number of locations must be
    greater than or equal to the lag value.
    There are too many locations (or regions) to show visualization.
    Location clustering map is not available for the Variogram Based
    Parametric model."
    
    This was reported to IBM SPSS Development.
    

Local fix

  • This is not a defect. On customer model the Correlations Map
    output item has two tables accompanying it, the Correlations
    Matrix and the Covariance Matrix.  Each of these tables has one
    row and one column for each location.  Your data file has 3,162
    locations, giving us two tables with 3,162 * 3,162 = 9,998,244
    cells in them, which are far too unwieldy to manage.
    The SPSS code currently limits the number of locations to 2,000
    (producing 4 million cell tables).  We will modify the warning
    "There are too many locations (or regions) to show
    visualization." to indicate that there are 3,162 locations and
    the maximum allowed is 2,000.
    
    However, the warning about autoregressive lag is too confusing.
    The warning text will be changed in the next fixpack to:
    --------------
    Warnings
    One or more locations that do not have enough consecutive valid
    time points have been removed from the modeling process.
    One or more locations that have constant target value have been
    removed from modeling process.
    There are too many locations (or regions) to show visualization.
    Location clustering map is not available for the Variogram Based
    Parametric model.
    --------------
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * see APAr text                                                *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * This issue has been addressed in IBM SPSS Statistics 24 Fix  *
    * Pack 1. Please upgrade to this FixPack level.                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * This issue has been addressed in IBM SPSS Statistics 24 Fix  *
    * Pack 1. Please upgrade to this FixPack level.                *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI64972

  • Reported component name

    SPSS STATISTICS

  • Reported component ID

    5725A54ST

  • Reported release

    O00

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-06-28

  • Closed date

    2016-09-27

  • Last modified date

    2016-09-27

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels

  • RO00 PSN

       UP

  • RO00 PSY

       UP

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Document Information

Modified date:
27 September 2016