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From |
Nick Cox <[email protected]> |

To |
[email protected] |

Subject |
Re: st: Confirming whether a variable is binary or continuous |

Date |
Mon, 19 Mar 2012 00:28:27 +0000 |

Your program just echoes its own input, confirming that what you specify is a binary variable is indeed binary and what you specify is a continuous variable is indeed continuous. It does no checking whatsoever. I am puzzled about why you think that is useful and indeed in what sense it is a solution to your original problem. Nick On Sun, Mar 18, 2012 at 5:07 PM, Bert Jung <[email protected]> wrote: > Thanks all for these helpful insights. I wanted to share my solution > which, if clumsy, works for me. The basic idea is to check whether a > particular variable is part of the continuous or binary varlist and > then proceed as appropriate. > > This approach keeps intact the order specified in varlist. I am > collecting estimation output and wanted the order to remain as > specified by the user. > > This is just a minimum working example, obviously various checks and > balances are of order. > > Cheers Bert > > > > cap program drop varcheck > program varcheck, nclass > > syntax varlist, contvars(varlist) binaryvars(varlist) > > * Loop over all variables in varlist; this approach keeps the order > in -varlist- intact > foreach v of local varlist { > > * (a) Is variable part of the variables specified in "contvars"? > local contvar: list v in contvars > > if `contvar'==1 { > di "`v' is specified as continuous variable" > } > > > * (b) Is variable part of the variables specified in "binaryvars"? > local propvar: list v in binaryvars > > if `propvar'==1 { > di "`v' specified as binary variable" > } > } > > end > > > sysuse auto, clear > > varcheck mpg price foreign weight, contvars(mpg price weight) > binaryvars(foreign) > > > > > > > > > > > > > > > > On Sun, Mar 18, 2012 at 7:40 AM, Alexander Jais <[email protected]> wrote: >> Sorry, stimmt ist bei mir noch als to do - kommt die Woche. >> >> Bist wieder aus INdien zurück - wie wars? >> >> LG >> Alex >> >> On 03/16/12, Bert Jung <[email protected]> wrote: >> >>> Dear Statalisters, >>> >>> I am writing a short program to make a balance table that compares >>> covariates across a treatment and control group. I am looking for a >>> way to confirm whether a variable is binary in order to use -prtest- >>> for proportions rather than -ttest- for continous variables. >>> >>> One option is to check the actual data values and do -prtest- if there >>> are only 0's and 1's. But a continuous but rare outcome could >>> accidentally also take these values, e.g. the number of >>> hospitalizations in the past 3 months. >>> >>> Is there a safer way to confirm that a variable is binary? >>> >>> Thanks for any pointers, >>> Bert * * 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: Confirming whether a variable is binary or continuous***From:*Cameron McIntosh <[email protected]>

**References**:**st: Confirming whether a variable is binary or continuous***From:*Bert Jung <[email protected]>

**Re: st: Confirming whether a variable is binary or continuous***From:*Alexander Jais <[email protected]>

**Re: st: Confirming whether a variable is binary or continuous***From:*Bert Jung <[email protected]>

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