topic Look Forward data step in SAS Programming https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172982#M33226 <HTML><HEAD></HEAD><BODY><P>Hello all.&nbsp; I am struggling to find a way to do the following.&nbsp; I have a data set and any time i have a reading of &gt;6 i need to pull into the same observation the next 2 dates and levels for the same task and road number.&nbsp; Below is an example data set and the result I am looking for.&nbsp; I found the attached website that gives examples of looking ahead one record but i have not been able to get any of it to work to look ahead 2. </P><P><A href="http://www.sascommunity.org/wiki/Four_methods_of_performing_a_look-ahead_read" title="http://www.sascommunity.org/wiki/Four_methods_of_performing_a_look-ahead_read">Four methods of performing a look-ahead read - sasCommunity</A></P><P></P><P>Any help would be greatly appreciated.</P><P></P><P><SPAN style="text-decoration: underline;">Data set Have</SPAN></P><P></P><P>data temp;</P><P></P><P>input road_number task_number $ read_date date9. read_level ;</P><P>format read_date date9.;</P><P>datalines;</P><P></P><P>9 2590A5 03MAY2014 11</P><P>9 2590A5 26APR2013 14</P><P>9 2590A5 27OCT2012 2</P><P>9 2590A5 28OCT2011 0</P><P>9 2590A5 27APR2011 0</P><P>9 2590A5 27JAN2011 0</P><P>9 2590A6 27JAN2011 0</P><P>9 2590A6 30JUL2010 7</P><P>9 2590A6 25JAN2010 4</P><P>9 2590A6 31JUL2009 0</P><P>9 2590A6 10JUN2006 1</P><P>9 2590A6 18MAR2006 0</P><P>9 2590A6 12DEC2005 .</P><P>9 2590A6 11SEP2005 2</P><P>9 2590A6 08MAR2005 0</P><P>9 2590A6 05DEC2004 9</P><P>9 2590A6 03SEP2004 0</P><P>10 2590A1 07JUL2014 0</P><P>10 2590A1 31DEC2013 0</P><P>10 2590A1 01JUL2013 0</P><P>10 2590A1 29DEC2012 1</P><P>;</P><P></P><P></P><P><SPAN style="color: #575757; text-decoration: underline;"><STRONG>Dataset need</STRONG></SPAN></P><P></P><P>Road_Number&nbsp;&nbsp; Task_number&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Read_date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Read_level&nbsp;&nbsp;&nbsp;&nbsp; read_2_date&nbsp;&nbsp;&nbsp;&nbsp; read_2_level&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; read_3_date&nbsp;&nbsp;&nbsp;&nbsp; Read_3_level</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 03MAY2014&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26APR2013&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27OCT2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26APR2013&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27OCT2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 28OCT2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 30JUL2010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 25JAN2010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 31JUL2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 05DEC2004&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 03SEP2004&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .</P><P>;</P></BODY></HTML> Wed, 07 Jan 2015 17:49:25 GMT dsbihill 2015-01-07T17:49:25Z Look Forward data step https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172982#M33226 <HTML><HEAD></HEAD><BODY><P>Hello all.&nbsp; I am struggling to find a way to do the following.&nbsp; I have a data set and any time i have a reading of &gt;6 i need to pull into the same observation the next 2 dates and levels for the same task and road number.&nbsp; Below is an example data set and the result I am looking for.&nbsp; I found the attached website that gives examples of looking ahead one record but i have not been able to get any of it to work to look ahead 2. </P><P><A href="http://www.sascommunity.org/wiki/Four_methods_of_performing_a_look-ahead_read" title="http://www.sascommunity.org/wiki/Four_methods_of_performing_a_look-ahead_read">Four methods of performing a look-ahead read - sasCommunity</A></P><P></P><P>Any help would be greatly appreciated.</P><P></P><P><SPAN style="text-decoration: underline;">Data set Have</SPAN></P><P></P><P>data temp;</P><P></P><P>input road_number task_number $ read_date date9. read_level ;</P><P>format read_date date9.;</P><P>datalines;</P><P></P><P>9 2590A5 03MAY2014 11</P><P>9 2590A5 26APR2013 14</P><P>9 2590A5 27OCT2012 2</P><P>9 2590A5 28OCT2011 0</P><P>9 2590A5 27APR2011 0</P><P>9 2590A5 27JAN2011 0</P><P>9 2590A6 27JAN2011 0</P><P>9 2590A6 30JUL2010 7</P><P>9 2590A6 25JAN2010 4</P><P>9 2590A6 31JUL2009 0</P><P>9 2590A6 10JUN2006 1</P><P>9 2590A6 18MAR2006 0</P><P>9 2590A6 12DEC2005 .</P><P>9 2590A6 11SEP2005 2</P><P>9 2590A6 08MAR2005 0</P><P>9 2590A6 05DEC2004 9</P><P>9 2590A6 03SEP2004 0</P><P>10 2590A1 07JUL2014 0</P><P>10 2590A1 31DEC2013 0</P><P>10 2590A1 01JUL2013 0</P><P>10 2590A1 29DEC2012 1</P><P>;</P><P></P><P></P><P><SPAN style="color: #575757; text-decoration: underline;"><STRONG>Dataset need</STRONG></SPAN></P><P></P><P>Road_Number&nbsp;&nbsp; Task_number&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Read_date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Read_level&nbsp;&nbsp;&nbsp;&nbsp; read_2_date&nbsp;&nbsp;&nbsp;&nbsp; read_2_level&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; read_3_date&nbsp;&nbsp;&nbsp;&nbsp; Read_3_level</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 03MAY2014&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26APR2013&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27OCT2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26APR2013&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 27OCT2012&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 28OCT2011&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 30JUL2010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 25JAN2010&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 31JUL2009&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0</P><P>9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2590A6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 05DEC2004&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 03SEP2004&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .</P><P>;</P></BODY></HTML> Wed, 07 Jan 2015 17:49:25 GMT https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172982#M33226 dsbihill 2015-01-07T17:49:25Z Re: Look Forward data step https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172983#M33227 <HTML><HEAD></HEAD><BODY><P>I agree SAS should make the Lead a bit easier <img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://communities.sas.com/i/smilies/16x16_smiley-happy.png" alt="Smiley Happy" title="Smiley Happy" /></P><P></P><P style="margin-bottom: .0001pt;"><SPAN style="color: navy; background: white; font-family: 'Courier New';"><STRONG>data</STRONG></SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> want;</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: blue; background: white;">merge</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> temp </SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: black; background: white;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; temp (</SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">firstobs</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">=</SPAN><SPAN style="color: teal; background: white; font-family: 'Courier New';"><STRONG>2</STRONG></SPAN> <SPAN style="font-family: 'Courier New'; color: blue; background: white;">rename</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">=(road_number=_road1 task_number=_task1 read_date=read_2_date read_level=read_2_level))</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: black; background: white;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; temp (</SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">firstobs</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">=</SPAN><SPAN style="color: teal; background: white; font-family: 'Courier New';"><STRONG>3</STRONG></SPAN> <SPAN style="font-family: 'Courier New'; color: blue; background: white;">rename</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">=(road_number=_road2 task_number=_task2 read_date=read_3_date read_level=read_3_level))</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: black; background: white;">;</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: blue; background: white;">if</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> read_level &gt;</SPAN><SPAN style="color: teal; background: white; font-family: 'Courier New';"><STRONG>6</STRONG></SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">;</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: blue; background: white;">if</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> (road_number ne _road1 </SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">or</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> task_number ne _task1) </SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">then</SPAN> <SPAN style="font-family: 'Courier New'; color: blue; background: white;">call</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> missing (read_2_date, read_2_level);&nbsp; </SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: blue; background: white;">if</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> (road_number ne _road2 </SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">or</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> task_number ne _task2) </SPAN><SPAN style="font-family: 'Courier New'; color: blue; background: white;">then</SPAN> <SPAN style="font-family: 'Courier New'; color: blue; background: white;">call</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> missing (read_3_date, read_3_level);&nbsp; </SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: blue; background: white;">drop</SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;"> _:;</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="color: navy; background: white; font-family: 'Courier New';"><STRONG>run</STRONG></SPAN><SPAN style="font-family: 'Courier New'; color: black; background: white;">;</SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: black; background: white;"> </SPAN></P><P style="margin-bottom: .0001pt;"><SPAN style="font-family: 'Courier New'; color: black; background: white;">You could also use LAG() function, but it is about the same verbose level. </SPAN></P></BODY></HTML> Wed, 07 Jan 2015 19:57:42 GMT https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172983#M33227 Haikuo 2015-01-07T19:57:42Z Re: Look Forward data step https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172984#M33228 <HTML><HEAD></HEAD><BODY><P>Thank you so very&nbsp; much,&nbsp; After coding it in with a couple more variables that i wanted to bring over works perfectly.&nbsp; I was so far out in left field I would have been next year before i got there.</P></BODY></HTML> Wed, 07 Jan 2015 20:42:17 GMT https://communities.sas.com/t5/SAS-Programming/Look-Forward-data-step/m-p/172984#M33228 dsbihill 2015-01-07T20:42:17Z