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From |
Masha Zakharova <mzakharo@sfu.ca> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Margins and Marginsplot |

Date |
Thu, 23 May 2013 23:55:33 -0700 (PDT) |

Dear StataList, I have a question on creating a plot for interaction of continuous and dummy variables. I have a linear model with two covariates and their interaction. I would like to get a plot that is NOT a straight line (i.e., that would show me what happens at given values of continuous variable). So in one model, the non-dummy variable is integer, and when I run following command: reg valence subj subj_cross subj_cross#subj if election==7, cluster(id) margins subj#subj_cross marginsplot (where subj is a variable that denotes distance and it only has integer values, and subj_cross is a dummy variable) - I get the plot that I need - 2 lines for each value of the dummy variable, and the lines are not straight so they show at which level of distance the effect starts to change. However, when I try running a command for a model where distance variable contains non-integer values, I get only straight lines. So when I run this command: reg valence c.obj cross cross#c.obj if election==7, cluster(id) margins cross, at(obj=(0(1)11)) marginsplot It just gives me two straight lines with different slopes. So my question is, is there any way to create a plot for this second model that would show me NON-STRAIGHT lines (so that I can see at which value of distance the effect starts to change) Thanks a lot, Masha * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

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