[R] Dealing with heterogeneity with varComb weights

Hi, I am trying to add multiple variance structures such as the first example below: vf1 - varComb(varIdent(form = ~1|Sex), varPower()) However my code below will not work can anybody please advise me? VFcomb-varComb(varExp(form=~depcptwithextybf),varFixed(form=~FebNAO)) also if you have two

Re: [R] Dealing with heterogeneity with varComb weights

RS27 wrote: Hi, I am trying to add multiple variance structures such as the first example below: vf1 - varComb(varIdent(form = ~1|Sex), varPower()) However my code below will not work can anybody please advise me?