RE: st: Precision and ordering issue in histograms titles

["MA V" <ma_v@hotmail.com>]

Svend replied:

This is a precision problem. Try to declare X double precision:

  sysuse auto
  gen double X=0.8-foreign
  twoway histogram mpg , by(X)
-------------------------------------------------

Unfortunately in my case this does not seem to work...
Suppose you do

sysuse auto, clear
gen X=0.8-foreign
gen double X1=X
twoway histogram mpg , by(X1)

this still gives histograms with not so pretty titles...

How can I create histograms by X, with nice titles, and without losing the 
order of the histograms?

Thanks,
MA


____________________________________________________________
Original post:

Hi--
I am trying to plot several histograms in one plot using:
twoway histogram mpg, by(X)

My question is the following: My X variable is numeric, so I am having some 
precision issues with the titles of the individual histograms. For example, 
if X=-0.2 the title for the corresponding histogram will come out as being 
"-0.2000000029802322" which is not a very pretty title... So, after reading 
some of the previous posts on the precision issues in Stata I concluded that 
one way to achieve nice titles would be to create a string variable, i.e. 
gen Xstring=string(X). Now the titles of the plot come out fine when I 
replace <by(X)> with <by(Xstring)>. The only problem is that the plots do 
not come out ordered by X (i.e. from the smallest X to the largest X) 
anymore...
Is there any way of getting around the precision issue without losing the 
ordering of the histograms?
Thanks for your help.
Best.
MA

_________________________________________________________________
Turn searches into helpful donations. Make your search count. 
http://click4thecause.live.com/search/charity/default.aspx?source=hmemtagline_donation&FORM=WLMTAG

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/