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| From | Nick Cox <njcoxstata@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Numbers with decimals and -float- command |
| Date | Tue, 8 Nov 2011 19:26:23 +0000 |
I found this difficult to follow. It's not clear that we need to understand "upwards", "downwards" and "sideways", as the key question is whether or not certain values are equal. First note that the FAQ you cite is due to Jeremy Wernow. You are puzzled why your -if- condition ignores e.g. observation 1870 in which you have 1870. 2.325 2.325 2.525 . . 2.525 and so on the face of should we be because (e.g.) the first and second values look identical. But that is just a matter of display format. As those variables are of the same type I would just look directly at those values assert totsh1 == totsh2 in 1870 di %21x (totsh1[1870] - totsh2[1870]) I don't see that the -float()- function will be illuminating here. Nick On Mon, Nov 7, 2011 at 7:47 PM, Joseph Monte <hmjc66@gmail.com> wrote: > The output below should contain only observations where there are both > upwards and downwards (or vice versa) movements in "totsh" (from > "totsh1" through "totsho~r"). Sideways movements are allowed. As an > example, obs 1157 has a downward movement from "totsh1" to "totsh2" > then upward to "totsh3" and then sideways to "totsho~r", which is > fine. "obs" is the number of "totsh*" observations in each row. > > However, notice observations 1870 (where the path is upward and NOT > downward) & 3275 (where the path is downward and NOT upward). These > observations should not be in type 3 but in type 1 (which captures > upward (and sideways) movements) and type 2 (which captures downward > (and sideways) movements respectively) - these are not shown for > brevity. On further investigation, I expected the issue to be resolved > if I used the -float- command from Nick's FAQ. > > http://www.stata.com/support/faqs/data/float.html > > However, as shown below, the -float- command does not seem to solve > the problem. In obs 1870, totsh1 & totsh2 do not seem to be equal even > though both are 2.325. Same issue for obs 3275. > > > . list totsh1 totsh2 totsh3 totsh4 totsh5 totshoffer obs type if type==3 > > +----------------------------------------------------------------------------+ > | totsh1 totsh2 totsh3 totsh4 totsh5 totsho~r > obs type | > |----------------------------------------------------------------------------| > 1157. | 3.5 3.483289 3.5 . . 3.5 > 4 3 | > 1362. | 1.615159 1.588584 . . . 2 > 3 3 | > 1543. | 1.5 2 . . . 1.75 > 3 3 | > 1691. | 20 25 21 15 . 15 > 5 3 | > 1762. | 1.75 1.9 . . . 1.865 > 3 3 | > |----------------------------------------------------------------------------| > 1764. | 1.785918 1.68277 . . . 2.4 > 3 3 | > 1768. | 2.25 2 . . . 2.666667 > 3 3 | > 1771. | 2.5 2.5 3 . . 2.9 > 4 3 | > 1774. | 5.5 4 4.7 4.65 4.65 4.65 > 6 3 | > 1870. | 2.325 2.325 2.525 . . 2.525 > 4 3 | > |----------------------------------------------------------------------------| > 2115. | 2.475 2.14 2.4 . . 2.4 > 4 3 | > 2256. | 2.1 1.85 . . . 2.1 > 3 3 | > 2514. | 2.5 2.75 . . . 2.4 > 3 3 | > 2524. | 4 2.7 2.2 2 . 2.2 > 5 3 | > 2598. | 2.5 2 2.35 . . 2.5 > 4 3 | > |----------------------------------------------------------------------------| > 2606. | 3.7 2.75 . . . 2.85 > 3 3 | > 2645. | 3.4 2.3 3.3 . . 3 > 4 3 | > 2657. | 2.3 2.5 2.1 1.65 . 1.65 > 5 3 | > 2719. | 2.5 2.949862 . . . 2.5 > 3 3 | > 2737. | 2 1.5 . . . 1.7 > 3 3 | > |----------------------------------------------------------------------------| > 2760. | 1 1.2 .9 . . .9 > 4 3 | > 2782. | 2.25 2 . . . 2.5 > 3 3 | > 2838. | 5.883 4 . . . 4.8 > 3 3 | > 2912. | 2 2.455 1.8 . . 1.8 > 4 3 | > 2962. | 1.15 1 1.05 . . 1.05 > 4 3 | > |----------------------------------------------------------------------------| > 2980. | 2.7 2 2.3 . . 2.3 > 4 3 | > 2987. | 2 1.4 1.6 . . 1.92 > 4 3 | > 3027. | 5.45 5.55 5.65 5.553 . 5.553 > 5 3 | > 3096. | 1.8 1.85 1.25 1.35 . 1.35 > 5 3 | > 3132. | 1.5 1 1.25 . . 1.25 > 4 3 | > |----------------------------------------------------------------------------| > 3188. | 2.3 2.7 . . . 2.3 > 3 3 | > 3251. | 17.2 6 . . . 7 > 3 3 | > 3275. | 6.8 6.8 5 . . 5 > 4 3 | > 3286. | 1.8 1.4 1.5 . . 1.5 > 4 3 | > 3306. | 6 4 5 . . 5 > 4 3 | > |----------------------------------------------------------------------------| > 3488. | 2.5 2.2 2.5 . . 2.5 > 4 3 | > 3519. | 16.25 13.25 13.3 14.9 . 14.9 > 5 3 | > 3566. | 12.575 10.5 5 4.0625 . 4.665 > 5 3 | > 3667. | 3.5 4 3.6 . . 3.6 > 4 3 | > 3877. | 6.25 5.5 6.5 . . 6.5 > 4 3 | > |----------------------------------------------------------------------------| > 3919. | 8 11.5 8.5 . . 8.5 > 4 3 | > 3944. | 7.5 4.7 . . . 5 > 3 3 | > 3954. | 6 5 . . . 6.44 > 3 3 | > 4002. | 10.3 14.6 10 . . 10 > 4 3 | > 4014. | 5 4.95 5.030305 5.045972 . 5.295972 > 5 3 | > +----------------------------------------------------------------------------+ > > . list totsh1 totsh2 type if float(totsh1)==float(totsh2) & totsh1!=. & type==3 > > +------------------------+ > | totsh1 totsh2 type | > |------------------------| > 1771. | 2.5 2.5 3 | > +------------------------+ > > . des totsh1 totsh2 > > storage display value > variable name type format label variable label > --------------------------------------------------------------------------------------------------------------------------------------------- > totsh1 float %9.0g > totsh2 float %9.0g > > > I would appreciate any help on the issue. I am using Stata 12. * * 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/