All the subcommands except /FILE and /BY are optional (as indicated in the manual). /FILE indicates the sources you want to match. /BY indicates the variable (which should exist in both sources) upon which you want to perform the match.
The optional /IN subcommand, according to the manual "... creates a numeric
variable ... which
takes the value 1 ... if the input file contributed to that case, and 0
otherwise".
For example try the following snippet.
* Create file1.
new file.
data list notable list /code * x *.
begin data.
90 0
91 1
92 2
93 3
end data.
save outfile='file1'.
* Create file2.
new file.
data list notable list /code * y *.
begin data.
92 22
93 23
94 24
95 25
96 26
end data.
save outfile='file2'.
* clear the working dataset
new file.
* Join file1 and file2 on their CODE variable, and leave the result in
the
working dataset. Additionally, create two new variables, FROM1 and
FROM2
which indicate the source of each observation.
match files
/file='file1'
/in=from1
/file='file2'
/in=from2
/by=code.
list.
On Fri, Jun 04, 2010 at 06:01:28AM -0700, Clarry wrote:
Hi,
I am very new to PSPP and have no knowledge of Syntax, although i can see
the logic of something once shown.
I have looked at the manual, at this:
MATCH FILES
/{FILE,TABLE}={*,???file-name???}
/RENAME=(src names=target names). . .
/IN=var name
/BY=var list
/DROP=var list
/KEEP=var list
/FIRST=var name
/LAST=var name
/MAP
but have no idea what to do with IN, BY, DROP, etc. Or the conventions
used.
If someone uses the parameters required to match one variable (let's call
it
"CODE") from File 1 to the same variable in File 2 then rename the new file
File 3, I would be able to adapt.
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