Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: How to label the value 999999999999


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: How to label the value 999999999999
Date   Wed, 8 Oct 2008 10:58:26 +0100

No; this is backward. It's the argument that is problematic, not the
result. 

The possible length of the value label, i.e. a string, is not biting
here. It is the fact that you are dealing with a large integer, on which
more is said elsewhere. 

The refusal of -tostring- to produce a string variable in your example
is easy to explain. -tostring- is a wrapper for -string(<real argument>,
"<format>")- with several safety checks and constraints. The format
defaults to %12.0g. Some experiments show that you need a different
format for the conversion of 9...9 (12 digits) to be reversible. 

. di string(999999999999, "%12.0g")
1.00000e+12

. di string(999999999999, "%13.0g")
1.000000e+12

. di string(999999999999, "%14.0g")
999999999999

So, -tostring- will work as desired here so long as a suitable
-format()- is specified. 

Nick
n.j.cox@durham.ac.uk 

Caleb Southworth

That's right. You cannot have a label that long. So: 

. tostring var, g(var2)
var cannot be converted reversibly; no generate

. tostring var, g(var2) force
var2 generated as str11
var2 was forced to string; some loss of information

Perhaps -mvdecode- would be the way to go. So:

mvdecode var, mv(999999999999)

then, to use codebook or whatever,

mvencode var, mv(999999999999)


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index