## Brief Stata Reference Page |

Class Homepages Fred's Homepage |

State has very good on-line help, just type help command or use the search button. | |

## Action | ## Stata command |

To open a log file: | log using filename.log |

To close the currently open log file: | log close |

To open Stata data set: | use dataset.dta |

To open ascii data set: | insheet using dataset.asc |

To view means and variances of variables: | summarize |

To create a new variable: | generate varname=value |

To change values of an old variable: | replace varname=new value |

To change specific values of an old variable: | replace varname=new value if varname= =value |

To generate a random uniform variable: | generate varname=uniform() |

To generate a random binary variable: | generate varname=round(uniform(),1) |

To set the number of observations: | set obs number |

To tabulate one variable: | table varname |

To tabulate one variable against another: | table rowvar colvar |

To graph a histogram of one variable with k possible values: | graph varname, bin(k) |

To conduct a difference in means test between two variables: | ttest varname1 varname2 |

To conduct a difference in means test for one variable (split by varname2): | ttest varname1, by(varname2) |

To run a regression of a dependent variable on independent variables: | regress depvar indvar1 indvar2 ... indvarK |

Class Homepages Fred's Homepage |

Created: September 07, 2001

Frederick J. Boehmke:

frederick-boehmke@uiowa.edu

Department of Political Science

341 Schaeffer Hall

University of Iowa

Iowa City, Iowa 52242

Phone: (319) 335 2342