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From | "Joseph Coveney" <jcoveney@bigplanet.com> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | st: Re: List Observations with Missing Values |
Date | Mon, 13 Aug 2012 13:03:37 +0900 |
Lisa Wang wrote: I would like to learn why this is not valid as I get this back from Stata ">=: operator invalid r(198)" If I read the help file for that return code it tells me that the syntax might be incorrectly specified?? - list c_c e_o e_c if >=. , separator(0) N notrim absolute - I thought that missing values are represented as a dot in Stata. I just want Stata to list out all the observations where there are missing values for those three variables, so I can check, before I drop these rows with missing observations. -------------------------------------------------------------------------------- The comparison operator needs two arguments, as in: list if x >= . Try something like the following: generate byte all_missing = 1 foreach var of varlist c_c e_o e_c { replace all_missing = 0 if !missing(`var') } list c_c e_o e_c if all_missing, separator(0) N notrim absolute Joseph Coveney * * 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/