[EpiData-list] RE: selecting on string variables

epidata-list at lists.umanitoba.ca epidata-list at lists.umanitoba.ca
Wed Jun 8 12:23:04 CDT 2005


But "selecting string variables" with Epiinfo is more
easier and faster.For selecting with it I don't need
to notice to upper or lower cases.
I have shch a problem with SPSS.And it takes time to
select and then receive a message indicating "nothing
has been selected"?
Why it must be so?
Thanks Reza

--- epidata-list at lists.umanitoba.ca wrote:

> >>> <epidata-list at lists.umanitoba.ca> 25-05-2005
> 16:59:11 >>>
> Why is this necessary?  I see "LION",  upper case
> and delineated with "
> ". Thanks, Kelly
> Because assigning this :
> if recnumber = 2 then animal = "LION"
> to a stringvariable of length 10 gets the value:
> "LION      "
> not the value
> "LION"
> 
> Computers are stupid and the designer makes the
> choices. My choice is that 
> "LION      " is different than "LION"
> 
> Someone would argue that we should always use the
> trimmed value of string variables, such that  "LION 
>     " is the same as "LION"
> but this would give the user a problem if he/she
> wanted to compare the full length string.
> 
> The strategy of EpiData for as well data entry as
> the coming release of analysis is that we make as
> few decisions as possible and let the end user
> decide. 
> 
> This is in contrast to other software developers who
> often impose new and changed strategies and changed
> ways of doing things on the users (Who is then
> forced to keep upgrading and learning new ways of
> doing what they could do with the old principle). 
> 
> EpiData tries NOT to invent new ways of doing
> things, but stick to the well founded principles of
> Epi6 (with appropriate extensions for those who wish
> to use the new principles of further documentation).
> 
> Regards
> 
> Jens Lauritsen
> Initiator of EpiData
> Coordinator EpiData Association
> 
> 
> _______________________________________________
> EpiData-list mailing list
> EpiData-list at lists.umanitoba.ca
>
http://lists.umanitoba.ca/mailman/listinfo/epidata-list
> 



		
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