update() works! Thank you thomas
On Jun 4, 2010, at 11:47 AM, Thomas Lumley wrote: > > > I think you're looking for the update() function. > > -thomas > > On Thu, 3 Jun 2010, Roni Kobrosly wrote: > >> Hi, >> >> I made a small table of strings that will serve as variable names for lm >> models I will run. The table looks like this: >> >>> varnames >> num name >> 1 1 zCANTAB_log_IED_totaltrials >> 2 2 zCANTAB_log_IED_preED >> 3 3 zCANTAB_logPALerrors >> 4 4 zCANTAB_PALstages >> 5 5 zCANTAB_logRTI >> 6 6 zCANTAB_RVP_Totalmisses >> 7 7 zCANTAB_log_RVP_falsealarm >> 8 8 zCANTAB_DMS_12000 >> 9 9 zCANTAB_PRM_Percent >> 10 10 zCANTAB_SRM_Percent >> 11 11 zCANTAB_sqrt_SWM_within >> 12 12 zCANTAB_sqrt_SWM_Total >> 13 13 zSS_WJ_PC >> 14 14 zSS_WJ_CALC >> 15 15 zSS_WJ_LW >> 16 16 zSS_WJ_AP >> 17 17 zSS_WJ_MF >> >> >> What I'm trying to do is >> >> >> varnames[1,2] -> outcome >> >> lm(outcome ~ income + covariate1 + coviarate2, data=my.data) -> model >> >> I get the following error message: >> "Error in model.frame.default(formula = outcome ~ Hollings_Enroll + >> Child_sex + : >> variable lengths differ (found for 'Hollings_Enroll')" >> >> But when I run the model: >> lm(zCANTAB_log_IED_totaltrials ~ income + covariate1 + coviarate2, >> data=my.data) -> model >> >> it works fine. Eventually, once I resolve this, I'd like to make a custom R >> function to automatically generate 17 regression models with these 17 >> outcome variable strings. Do you have any ideas how to resolve this error? >> >> Thanks! >> -Roni >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > Thomas Lumley Assoc. Professor, Biostatistics > tlum...@u.washington.edu University of Washington, Seattle > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
