[R] {nlme} Question about modeling Level two heteroscedasticity in HLM

[b88207001 at ntu.edu.tw]

Hi Bert,

Thank you so much for your kind guidance! I will post my question there.

Best,
Yen

引述 Bert Gunter <bgunter.4567 at gmail.com>:

> A better place for this post would be on R's mixed models list:
> r-sig-mixed-models  .
>
> Cheers,
> Bert
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Wed, Aug 16, 2017 at 6:17 AM,  <b88207001 at ntu.edu.tw> wrote:
>> Hello dear uesRs,
>>
>> I am working on modeling both level one and level two heteroscedasticity in
>> HLM. In my model, both error variance and variance of random intercept /
>> random slope are affected by some level two variables.
>>
>> I found that nlme is able to model heteroscedasticity. I learned how to use
>> it for level one heteroscedasticity but don't know how to use it to model
>> the level two heteroscedasticity. I wonder if anyone could give me some
>> guide how to do it or any suggested software / packages if nlme is unable to
>> do it.
>>
>> Many thanks in advance!
>>
>> Best,
>> Yen
>>
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>