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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: ICE with Interval Error #459 multiple imputation |

Date |
Tue, 21 Aug 2012 19:25:29 +0100 |

The initial assignments to 999 are puzzling here. This code can be condensed to foreach v in sclifeca2 sclifeca3 sclifeca4 { gen `v'll1 = cond(`v' == ., 1, `v') gen `v'ul7 = cond(`v' == ., 7, `v') } Nick On Tue, Aug 21, 2012 at 6:56 PM, Laura Kudrna <laura.kudrna@gmail.com> wrote: > Dear Antonis, > > Thank you very much for solving my problem! Using the ologit prefix > combined with your example for how to set my upper and lower limits > solved everything. > > For anyone else who struggles, I've included my syntax below for > defining the upper and lower limits of my variables sclifeca2, > sclifeca3, and sclifeca4 to 7 and 1, respectively. > > Best wishes, > Laura > > gen sclifeca2ll1 = 999 > replace sclifeca2ll1 = sclifeca2 if sclifeca2 !=. > replace sclifeca2ll1 = 1 if sclifeca2 == . > > gen sclifeca2ul7 = 999 > replace sclifeca2ul7 = sclifeca2 if sclifeca2 !=. > replace sclifeca2ul7 = 7 if sclifeca2 == . > > gen sclifeca3ll1 = 999 > replace sclifeca3ll1 = sclifeca3 if sclifeca3 !=. > replace sclifeca3ll1 = 1 if sclifeca3 == . > > gen sclifeca3ul7 = 999 > replace sclifeca3ul7 = sclifeca3 if sclifeca3 !=. > replace sclifeca3ul7 = 7 if sclifeca3 == . > > gen sclifeca4ul7 = 999 > replace sclifeca4ul7 = sclifeca4 if sclifeca4 !=. > replace sclifeca4ul7 = 7 if sclifeca4 == . > > gen sclifeca4ll1 = 999 > replace sclifeca4ll1 = sclifeca4 if sclifeca4 !=. > replace sclifeca4ll1 = 1 if sclifeca4 == . > > > On Mon, Aug 13, 2012 at 7:49 AM, A Loumiotis > <antonis.loumiotis@gmail.com> wrote: >> Perhaps you could also try to use ologit instead of intreg to impute >> sclifeca2. Make sure you use the o. prefix, ie, >> ice o.sclifeca2 ..., saving(imputed_dataset) m(5) >> >> On Mon, Aug 13, 2012 at 9:20 AM, A Loumiotis >> <antonis.loumiotis@gmail.com> wrote: >>> Hi Laura, >>> >>> I'm not sure if you are setting up your lower and upper variables >>> correctly because you said that when the observation is not missing >>> both upper and lower bounds take the value of 7. This is not correct. >>> They must be equal to the non-missing value. Here is an example of >>> how they should look: >>> >>> input sclifeca2 ll1 ul7 >>> 4 4 4 >>> . 1 7 >>> 2.5 2.5 2.5 >>> 3 3 3 >>> . 1 7 >>> end >>> >>> Best, >>> Antonis >>> >>> >>> >>> >>> On Fri, Aug 10, 2012 at 9:32 PM, Laura Kudrna <laura.kudrna@gmail.com> wrote: >>>> Hi, >>>> >>>> Thank you for your response. Apologies about ICE, I'm new to the >>>> listserve: ICE comes from //www.homepages.ucl.ac.uk/~ucakjpr/stata/ >>>> >>>> To answer your question about the bounds, yes: when I created the >>>> upper limit variable ul7 that has no missing values and I include it >>>> in the ice code, the upper and lower bounds remain 7. But for >>>> example, when I impute my variable sclifeca2 "Life Satisfaction" >>>> which has a scale of 1 to 7 I get imputed values ranging from -0.5 to >>>> 9. I am using multiple imputation to impute all the predictor and >>>> explanatory variables at once. >>>> >>>> I replicated the STATA code precisely from the ICE help for interval. >>>> >>>> ICE help for interval states: ...intlist has the syntax varname:llvar >>>> ulvar [, varname:llvar ulvar ...], where each varname is an >>>> interval-censored variable, each llvar contains the lower bound (a) >>>> for varname and each ulvar contains the upper bound (b) >>>> >>>> My syntax is: ice ll1 ul7 sclifeca2 .....(other variables)....., >>>> saving(imputed_dataset) m(5) interval(sclifeca2:ll1 ul7). >>>> >>>> I still can't understand why I am getting the error message and I >>>> would be most grateful if you have any other suggestions on how to fix >>>> it. >>>> >>>> Best wishes, >>>> Laura >>>> >>>> >>>> On Fri, Aug 10, 2012 at 7:32 AM, A Loumiotis >>>> <antonis.loumiotis@gmail.com> wrote: >>>>> If the variable that you are imputing with interval regression is not >>>>> missing then the lower and upper bounds should equal that non missing >>>>> value. Is this true in your case? See -help ice- especially the >>>>> interval option. >>>>> >>>>> -ice- is a user written program available from SJ-9-3. Please state >>>>> where user written programs come from as explained in Statalist FAQ. >>>>> >>>>> >>>>> >>>>> >>>>> On Fri, Aug 10, 2012 at 12:29 AM, Laura Kudrna <laura.kudrna@gmail.com> wrote: >>>>>> Hi, >>>>>> >>>>>> I am having the same error message / problem as the post below from >>>>>> the STATA message boards - Error #459. It occurs when using the >>>>>> interval option with ICE. >>>>>> >>>>>> I generated two variables, ll1 and ul7, containing values of 1 and 7 >>>>>> respectively to set the upper and lower bound for my variable >>>>>> sclifeca2. >>>>>> >>>>>> My STATA code is: >>>>>> >>>>>> ice ll1 ul7 sclifeca2 sclifeca3 sclifeca4 sclddr2 sclddr3 sclddr4 >>>>>> iincome2 iincome3 iincome4 education2 occupation2 unemployed2 >>>>>> unemployed3 sex2 age2 age3 age4 partner2 partner3 partner4 vehicles2 >>>>>> vehicles3 vehicles4 holiday2 holiday3 holiday4 secprop2 secprop3 >>>>>> secprop4 weight2 weight3 weight4, saving(imputed_dataset) m(5) >>>>>> interval(sclifeca2:ll1 ul7) >>>>>> >>>>>> My error message is: >>>>>> Error #459 encountered while running -uvis- >>>>>> I detected a problem with running uvis with command intreg on response sclifeca2 >>>>>> and covariates sclifeca3 sclifeca4 sclddr2 sclddr3 sclddr4 iincome2 >>>>>> iincome3 iincome4 education2 occupation2 unemployed2 unemployed3 sex2 >>>>>> ag >>>>>>> e2 age3 age4 partner2 partner3 partner4 vehicles2 vehicles3 vehicles4 holiday2 holiday3 holiday4 secprop2 secprop3 secprop4 weight2 weight >>>>>>> 3 weight4. >>>>>> >>>>>> The offending command resembled: >>>>>> uvis intreg sclifeca2 sclifeca3 sclifeca4 sclddr2 sclddr3 sclddr4 >>>>>> iincome2 iincome3 iincome4 education2 occupation2 unemployed2 >>>>>> unemployed3 >>>>>>> sex2 age2 age3 age4 partner2 partner3 partner4 vehicles2 vehicles3 vehicles4 holiday2 holiday3 holiday4 secprop2 secprop3 secprop4 weight2 >>>>>>> weight3 weight4 , gen([imputed]) >>>>>> >>>>>> you may wish to try the -persist- option to persist beyond this error. >>>>>> dumping current data to ./_ice_dump.dta >>>>>> something that should be true of your data is not >>>>>> >>>>>> When I use the "persist" option, the data is imputed, but doesn't set >>>>>> the upper and lower bounds of my variable. >>>>>> * * 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: ICE with Interval Error #459 multiple imputation***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**References**:**st: ICE with Interval Error #459 multiple imputation***From:*Laura Kudrna <laura.kudrna@gmail.com>

**Re: st: ICE with Interval Error #459 multiple imputation***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**Re: st: ICE with Interval Error #459 multiple imputation***From:*Laura Kudrna <laura.kudrna@gmail.com>

**Re: st: ICE with Interval Error #459 multiple imputation***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**Re: st: ICE with Interval Error #459 multiple imputation***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**Re: st: ICE with Interval Error #459 multiple imputation***From:*Laura Kudrna <laura.kudrna@gmail.com>

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