title: X12 seasonal adjustment program from census, problem with input file extensions
body: <p>I downloaded the X12 seasonal adjustment program located here: <a href="http://www.census.gov/srd/www/x12a/x12downv03_pc.html" rel="nofollow">http://www.census.gov/srd/www/x12a/x12downv03_pc.html</a></p>
  
  <p>I followed the setup and got the setting correct.  When I go to select a file to input I have four options for file extensions to import which are ".spc" ".mta" ".dta" and "."</p>
  
  <p>The problem is that I have data in excel and I have searched extensively through search engines and I do cannot figure out a way to get data from excel into one of these formats so I can do a seasonal adjustment on my data.  Thanks</p>
  
  <p>ADDED: After converting to a dta file (using R thanks to the comments left below) it looks like the program makes you convert it also to a .spc file as well.  Anyone have a lead on how to do this? thanks</p>