Re: st: How to deal with the accruacy of storage type?

[Jeph Herrin <junk@spandrel.net>]

 count if abs(x-y)<0.0001

where 0.0001 indicates the precision.

hth,
Jeph

gjhxmu@sina.com wrote:
> I encountered a problem on the accuracy of storage type. 
>
> For example, I typed the following in the stata,
>
>
> clear
> input       x y
>     .46520616   .4652062
>     .02347426   .0234743
>     .01774185   .0177418
>     .04014428   .0401443
>     .24818808   .2481881
>     .41385191   .4138519
>     .27035237   .2703524
>     .03764375   .0376438
>     .22899382   .2289938
>     .08620364   .0862036
> end
> l
> count if x==y
>
>
> The result of "count if x==y" is 0. However, in my actual matter, this situation should be treated as equal between x and y if  the # digits (such as four or five) after decimal are the same. 
>
> What is the right command to express the above meaning?
>
> Thank you a lot for any help.
>
>
> Best regards,
>
> Rose.
>
>  
>
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