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📄 m27 - reading hierarchical files - 28 of 30.mht

📁 sas的考试样题
💻 MHT
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      =
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>&nbsp; &nbsp; &nbsp;</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>&nbsp; &nbsp;&nbsp;=20
      </STRONG>&nbsp;</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>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <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
      &nbsp;<FONT color=3D#003399>_N_ <STRONG>&gt;</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>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<FONT color=3D#003399>=20
      <EM>&nbsp;</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>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;=20
      &nbsp;<STRONG>INPUT</STRONG> <EM>variable</EM>;</FONT></TD></TR>
  <TR>
    <TD><FONT color=3D#003399>&nbsp; &nbsp;=20
      &nbsp;&nbsp;<STRONG>END;</STRONG></FONT></TD></TR>
  <TR>
    <TD><FONT color=3D#003399>&nbsp;&nbsp; &nbsp; &nbsp;</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>&nbsp; &nbsp;=20
      &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; =
</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>&nbsp; &nbsp; &nbsp; </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_ &gt; 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
      =
src=3D"http://www.sas.com/apps/elearning/images/en/navimages/linebox.gif"=
=20
      width=3D14></TD>
    <TD colSpan=3D2><IMG height=3D7 alt=3D""=20
      =
src=3D"http://www.sas.com/apps/elearning/images/en/navimages/linegray.gif=
"=20
      width=3D"100%"></TD></TR>
  <TR>
    <TD>&nbsp;</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
      face=3D"Arial, Helvetica, sans-serif"><BR><FONT color=3Dgray =
size=3D1><A=20
      class=3Dcopyrightlink href=3D"http://www.sas.com/Copyright.html"=20
      target=3D_blank>Terms of Use &amp; Legal Information</A> | <A=20
      class=3Dcopyrightlink href=3D"http://www.sas.com/Privacy.html"=20
      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
      =
src=3D"http://www.sas.com/apps/elearning/images/en/navimages/next2.gif"=20
      width=3D30 border=3D0 =
name=3Dnext2></A></DIV></TD></TR></TBODY></TABLE>
<P>&nbsp;</P>
<SCRIPT>writeLessonDiv()</SCRIPT>

<SCRIPT>writeHelpDiv()</SCRIPT>
<!-- #EndLibraryItem --><!-- InstanceEnd --></BODY></HTML>

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