Data cache

[Rajeshms]

Hi all ,

I would like to know whats the purpose of data cache under the menu File. Can any one help me the meaning of cache in SPSS. 

Thanks in advance.

--

Rajesh M S

[Albert-Jan Roskam]

CACHE will (after the next data pass) create a temporary copy of the active file (VAF), so the orginal data won't have to be re-read over and over again. That's pretty neat/effcient, e.g.. when you're retrieving data with a gazillion-line SQL expression from a database.

GET DATA / SQL = ....

CACHE.

FRE someVar. /* procedure --> data pass --> cache file will actually be made, and freqs are generated.

MEANS someVar. /* means are calculated using cache file, no need to run sql query again.

 

Regards,
Albert-Jan

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All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a
fresh water system, and public health, what have the Romans ever done for us?
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From: Rajeshms <[hidden email]>
To: [hidden email]
Sent: Friday, November 9, 2012 11:57 AM
Subject: [SPSSX-L] Data cache

Hi all ,

I would like to know whats the purpose of data cache under the menu File. Can any one help me the meaning of cache in SPSS. 

Thanks in advance.

--

Rajesh M S