📄 m27 - reading hierarchical files - 28 of 30.mht
字号:
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_16.htm"><STRONG>RETAI=
N</STRONG>=20
<EM>variable</EM><STRONG>;</STRONG></A></TD></TR>
<TR>
<TD><FONT color=3D#003399><STRONG> </STRONG> =
</FONT><FONT=20
color=3D#003399><STRONG>INPUT=20
</STRONG><EM>variable</EM><STRONG>;</STRONG></FONT></TD></TR>
<TR>
<TD><FONT color=3D#003399><STRONG> =20
</STRONG> </FONT><A=20
onmouseover=3D"window.status=3D'Display details on the IF-THEN =
statement.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_6.htm"><STRONG>IF</ST=
RONG>=20
=
<EM>variable</EM><STRONG>=3D'</STRONG><EM>condition</EM><STRONG>'</STRONG=
>=20
<STRONG>THEN</STRONG></A> <A=20
onmouseover=3D"window.status=3D'Display details on simple DO =
groups.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_17.htm"><STRONG>DO;</=
STRONG></A></TD></TR>
<TR>
<TD> <A=20
onmouseover=3D"window.status=3D'Display details on the DO group =
actions.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_17.htm"><STRONG>IF</S=
TRONG></A>=20
<FONT color=3D#003399>_N_ <STRONG>></STRONG> 1</FONT> <A=20
onmouseover=3D"window.status=3D'Display details on the DO group =
actions.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_17.htm"><STRONG>THEN<=
/STRONG>=20
<STRONG>OUTPUT;</STRONG></A></TD></TR>
<TR>
<TD> <FONT color=3D#003399>=20
<EM> </EM></FONT><A=20
onmouseover=3D"window.status=3D'Display details on the SUM =
statement.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_17.htm#total"><EM>sum=
mary-variable</EM><STRONG>=3D</STRONG>0;</A></TD></TR>
<TR>
<TD><FONT color=3D#003399> =20
<STRONG>INPUT</STRONG> <EM>variable</EM>;</FONT></TD></TR>
<TR>
<TD><FONT color=3D#003399> =20
<STRONG>END;</STRONG></FONT></TD></TR>
<TR>
<TD><FONT color=3D#003399> </FONT><NOBR><A=20
onmouseover=3D"window.status=3D'Display details on the ELSE =
statement.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_19.htm">ELSE=20
<STRONG>IF</STRONG>=20
=
<EM>variable</EM><STRONG>=3D'</STRONG><EM>condition</EM><STRONG>'</STRONG=
>=20
<STRONG>THEN</STRONG></A><FONT color=3D#003399>=20
<EM><BR></EM></FONT></NOBR><FONT color=3D#003399> =20
=
</FONT><NOBR><FONT=20
=
color=3D#003399><EM>summary-variable</EM>+<EM>expression</EM><STRONG>;</S=
TRONG></FONT></NOBR></TD></TR>
<TR>
<TD><FONT color=3D#003399> </FONT><A=20
onmouseover=3D"window.status=3D'Display details on determining the =
end of a raw data file.'; "=20
onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
=
href=3D"http://www.sas.com/apps/OLTRN/59080/m27/m27_21.htm"><STRONG>IF</S=
TRONG>=20
<EM>variable</EM> <STRONG>THEN OUTPUT;</STRONG></A></TD></TR>
<TR>
<TD><FONT color=3D#003399><STRONG>RUN;=20
</STRONG></FONT></TD></TR></TBODY></TABLE></CENTER>
<P align=3Dcenter>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"85%" border=3D0>
<TBODY>
<TR>
<TD align=3Dleft>
<HR>
</TD></TR></TBODY></TABLE><BR></CENTER><!-- InstanceEndEditable -->
<P><!-- InstanceBeginEditable name=3D"sampleprogram" -->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"85%" border=3D0>
<TBODY>
<TR>
<TD align=3Dleft>
<P><STRONG><A name=3DSample>Sample Programs</A></STRONG> </P>
<BLOCKQUOTE><STRONG>Program to Create One Observation for Each =
Detail=20
Record</STRONG> </BLOCKQUOTE><PRE><FONT color=3D#003399> =
libname perm 'c:\records\census2k';</FONT>
<FONT color=3D#003399> filename census =
'c:\records\census2k\survey.dat';</FONT>
<FONT color=3D#003399>data perm.people(drop=3Dtype);</FONT>
<FONT color=3D#003399> infile census;</FONT>
<FONT color=3D#003399> retain Address;</FONT>
<FONT color=3D#003399> input type $1. @;</FONT>
<FONT color=3D#003399> if type=3D'H' then input @3 address =
$15.;</FONT>
<FONT color=3D#003399> if type=3D'P';</FONT>
<FONT color=3D#003399> input @3 Name $10. @13 Age 3. @16 Gender =
$1.;</FONT>
<FONT color=3D#003399>run;</FONT>
</PRE>
<BLOCKQUOTE><STRONG>Program to Create One Observation for Each =
Header=20
Record</STRONG> </BLOCKQUOTE><PRE> <FONT =
color=3D#003399>libname perm 'c:\records\census2k';</FONT>
<FONT color=3D#003399> filename census =
'c:\records\census2k\survey.dat';</FONT>
<FONT color=3D#003399> data perm.residnts (drop=3Dtype);</FONT>
<FONT color=3D#003399> infile census end=3Dlast;</FONT>
<FONT color=3D#003399> retain Address;</FONT>
<FONT color=3D#003399> input type $1. @;</FONT>
<FONT color=3D#003399> if type=3D'H' then do;</FONT>
<FONT color=3D#003399> if _n_ > 1 then output; </FONT>
<FONT color=3D#003399> Total=3D0;</FONT>
<FONT color=3D#003399> input address $ 3-17;</FONT>
<FONT color=3D#003399> end;</FONT>
<FONT color=3D#003399> else if type=3D'P' then total+1;</FONT>
<FONT color=3D#003399> if last then output;</FONT>
<FONT color=3D#003399> run;</FONT></PRE>
<P>
<HR>
</TD></TR></TBODY></TABLE><BR><!-- InstanceEndEditable -->
<P><!-- InstanceBeginEditable name=3D"pointstoremember" -->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"85%" border=3D0>
<TBODY>
<TR>
<TD align=3Dleft><STRONG><A name=3DPoints>Points to =
Remember</A></STRONG>=20
<UL>
<LI>As with automatic variables, the END=3D variable is not =
written to the=20
data set. <BR><BR>
<LI>Values are automatically retained when using a sum =
statement.=20
Therefore, it may be necessary to set the value of the counter =
variable=20
back to <EM>0</EM> when a new header is encountered.=20
</LI></UL></TD></TR></TBODY></TABLE><!-- InstanceEndEditable =
--></CENTER><!-- #BeginLibraryItem "/Library/nav_regular_bottom.lbi" -->
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%">
<TBODY>
<TR>
<TD width=3D14><IMG height=3D7 alt=3D""=20
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src=3D"http://www.sas.com/apps/elearning/images/en/navimages/linebox.gif"=
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width=3D14></TD>
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src=3D"http://www.sas.com/apps/elearning/images/en/navimages/linegray.gif=
"=20
width=3D"100%"></TD></TR>
<TR>
<TD> </TD>
<TD vAlign=3Dtop><FONT face=3D"Verdana, Arial, Helvetica, Sans =
Serif"=20
color=3Dgray size=3D1><A class=3Dcopyrightlink=20
href=3D"javascript:%20openOther('../copyrite.htm')"><FONT=20
face=3D"Arial, Helvetica, sans-serif">Copyright</FONT></A> <FONT=20
face=3D"Arial, Helvetica, sans-serif">=A9 2003 SAS Institute Inc., =
Cary, NC,=20
USA. All rights reserved.</FONT></FONT> <FONT=20
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size=3D1><A=20
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target=3D_blank>Privacy Statement</A></FONT> </FONT></TD>
<TD width=3D60>
<DIV align=3Dright><A=20
onmouseover=3D"rOver('back2');window.status=3D'Display the =
previous page.';return true"=20
accessKey=3Db =
onmouseout=3D"rOut('back2');window.status=3D'';return true"=20
href=3D"javascript:%20prevPage()"><IMG height=3D19 alt=3Dback=20
=
src=3D"http://www.sas.com/apps/elearning/images/en/navimages/back2.gif"=20
width=3D30 border=3D0 name=3Dback2></A><A=20
onmouseover=3D"rOver('next2');window.status=3D'Display the next =
page.';return true"=20
accessKey=3Dn =
onmouseout=3D"rOut('next2');window.status=3D'';return true"=20
href=3D"javascript:%20nextPage()"><IMG height=3D19 alt=3Dnext=20
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width=3D30 border=3D0 =
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<P> </P>
<SCRIPT>writeLessonDiv()</SCRIPT>
<SCRIPT>writeHelpDiv()</SCRIPT>
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