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From |
"DEBORAH L. HUANG" <huangdx@u.washington.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
RE: st: Code to generate dummy variable from several categorical variables? |

Date |
Mon, 16 Jan 2012 16:46:25 -0800 (PST) |

Thank you for input and to clarify what I'm trying to do: I'm trying to generate a dummy variable with 4 indicators; the values of the indicators are to be determined by 3 other binary variables which are not mutually exclusive. If generating a categorical variable could be done more easily that would be fine. I've already tried generating a composite categorical variable but have recoding problems as A, B and C are not mutually exclusive. For example, possible values for binary variables A, B and C as follows: A B C 1. 1 0 0 2. 1 1 0 3. 1 1 1 4. 0 1 0 5. 0 1 1 6. 0 0 1 7. 0 0 0 So I'd like to generate dummy variable abnlX, where - abnlX1 includes all subjects where A=1 - abnlX2 includes all subjects where B=1 - abnlX3 includes all subjects where C=1 My difficulty is in figuring out how to code in order to re-categorize subjects #2, #3 and #5 into all the appropriate categories (e.g., subject #2 should count toward abnlX1 and abnlX2). Additionally, there are some missing values for any of the variables A, B or C (subject may be missing value for A but have values for B and C, etc.) but I would still like to be able to include the available values. Hopefully my question makes more sense. Thank you! Deborah * * 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/

**Follow-Ups**:**Re: st: Code to generate dummy variable from several categorical variables?***From:*David Hoaglin <dchoaglin@gmail.com>

**Re: st: Code to generate dummy variable from several categorical variables?***From:*Nick Cox <njcoxstata@gmail.com>

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