sas

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INTRODUCTION TO SAS PROGRAMMING
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• Tyoes off SAS
• Overview of SAS Products
• Basic Structure of SAS
• Structure of SAS programs
• FTP Access
• Reading SAS programs from external files

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• Overview of SAS Products
• Base SAS - data management and basic procedures
  SAS/STAT - statistical analysis SAS/GRAPH -
  presentation quality graphics SAS/OR -
  Operations research SAS/ETS - Econometrics and
  Time Series Analysis SAS/IML - interactive
  matrix language SAS/AF - applications facility
  (menus and interfaces) SAS/QC - quality control
  There are other specialized products for
  spreadsheets, access to databases, connectivity
  between different machines running SAS

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• Basic Structure of SAS
• There are two main components to most SAS
  programs - the data step(s) and the procedure
  step(s). The data step reads data from external
  sources, manipulates and combines it with other
  data set and prints reports. The data step is
  used to prepare your data for use by one of the
  procedures (often called procs). SAS is very
  lenient about the format of its input -
  statements can be broken up across lines,
  multiple statements can appear on a single line,
  and blank spaces and lines can be added to make
  the program more readable.

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• Structure of SAS programs
• Lines beginning with an asterisk () are treated
  as comments. Alternatively you can enclose
  comments between / and /. You can combine as
  many data and proc steps in whatever order you
  want. Data steps begin with the word data and
  procedure steps begin with the word proc. The
  run command signals to SAS that the previous
  commands can be executed. Terminate an
  interactive SAS job with the endsas statement.
  There are global options (like linesize and
  pagesize) as well as options specific to datasets
  and procedures.

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• FTP Access
• SAS provides the ability to read data directly
  from an FTP server, without the need to create a
  local copy of the file, through the ftp keyword
  of the filename statement. Suppose there is a
  data file called user.dat in the directory public
  on an ftp server named ftp.myserver.com. If your
  user name is joe and your password is secret, the
  following statement will establish a fileref for
  reading the data filename myftp ftp user.dat
  cd/public userjoe passsecret
  hostftp.myserver.com

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• Reading SAS programs from external files
• The infile statement can be used to read data
  which is stored in a file separate from your SAS
  program. When you want SAS to read your program
  from an external file you can use the include
  statement, followed by a filename or fileref.
  After SAS processes a include statement, it
  continues to read data from its original source
  (input file, keyboard or display manager