
                   ²±° Editing A Data File °±²


With this data editor you can alter the contents of your data set
as  easily  as  altering documents with your word processor.  The 
descriptions below will help you understand what you can do  with
the  SPPC  Data  Manager and assist you with the operation of the
data manager. 


                   Moving about your data file  

When you begin an edit session the data manager will display your 
data in video pages of 15  cases  and  5  variables  at  a  time.
Should  your  data  file have fewer than 15 cases or fewer than 5
variables in you data file the data manager will present all data
within these boundaries.  

When the editor is first invoked (brought into memory) the cursor 
is positioned at the first variable and the first case.  You  may
reposition  the  cursor over any data element by simply using the
cursor control keys on the numeric key pad.    

For those data sets that have  more  than  5  variables  you  may
"page" right or "page" left by pressing Ctrl Right Arrow and Ctrl
Left  Arrow.   That  is,  hold down the control key and press the 
right arrow key on the numeric key board (remember to toggle  the
NUM  LOCK  key to the appropriate state).  Likewise, page left by 
holding down the control key and pressing  the  left  arrow  key.
Also  the  screen  is  "scrolled"  left or right when you advance 
beyond the boundaries of the screen by using the left  and  right
cursor  control  keys.   You  may  also  go  directly to the last
variable in the data file by pressing the Ctrl End key.

Important  -  the data manager will quickly page down through you 
data set but will not allow you to return to previous pages  once
you display the next page of data.


                    Entering & Altering Data

Entering data within your data file at this point means replacing
currently  displayed  values  with  new or correct values.  To do 
this locate the cursor over the value  you  wish  to  update  and
enter  the  new  value.   Once  you have typed the new or correct 
value at its' proper position you terminate  and  formally  enter
the data value by pressing the carriage return key.  

The data manager offers a "last ditch" facility for editing ease.
This  is  an "undo" function that you may incorporate if you type
in an incorrect value but have NOT entered it into the data file. 
Once you begin to enter a data value and discover  that  you  are
not  in  the  correct  position or decide to retain the old value
simply press the ESC key and restore the previous data value.


                         Deleting Cases  

The data manager makes deleting cases a snap.  Select the  Delete
Cases  option  of the HELP menu and enter the starting and ending 
case numbers that you wish  to  delete.   Note  that  the  delete
operation  is inclusive.  That is, both the starting case and the 
ending case will be deleted along with those  cases  between  the
end  points.   For  example,  should you decide to delete cases 5
through 8 then the data manager will delete cases 5, 6, 7, and 8.
If one the other hand you wish  to  delete  only  one  case  just
specify  that  case  as both the starting case and ending case to
delete. The data manager will not allow you to delete the  entire
display page of data.

The  data  manager  will  check  your  input  for  a valid range,
renumber the remaining data cases and  return  you  to  the  edit
mode.


                     Change Header Statement

Within the edit mode of the data manager you may alter the header
statement any any time and as many times as you  like.  From  the
HELP  menu  select  the Change Header Statement option and change
the header statement to read as you like.   You  may  abort  this
process  at any time prior to pressing the carriage return key by
pressing the ESC key.  This will restore the header statement  to
its' previously state.  Only 80 characters are allowed to describe
your data file.


