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| From | Yu Xue <snowrain@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: Stata cannot do math? |
| Date | Wed, 18 May 2011 18:44:14 -0500 |
Hi All, This may be a stupid question. Here are the command and Stata output: .set obs 50 .gen a=100.1 .count if a==100.1 0 .tab a 100.1 .sum a variable obs mean s.d. min max a 50 100.1 0 100.1 100.1 .gen b=a-100 .tab b 0.0999985 So, Stata shows that a is equal to 100.1, but actually, it is equal to 100.0999985.... Can anyone explain to me what this is? Do I have to set precision when I do math in Stata? How to set precision? Thanks! Yu * * 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/