t;>>> Best,
>>>>>> Wolfgang
>>>>>>
>>>>>> -Original Message-
>>>>>> From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie
>>>>>> ten Cate
>>>>>> Sent: Sunda
; Arie
>>>>
>>>> On Sun, Oct 8, 2017 at 4:38 PM, Viechtbauer Wolfgang (SP)
>>>> wrote:
>>>>> Ah, I think you are referring to this part from ?lm:
>>>>>
>>>>> "(including the case that there are w_i observations equ
is is what 'weights' should be used for
>>>> (the other part before that is correct). Sorry, I misunderstood the point
>>>> you were trying to make.
>>>>
>>>> Best,
>>>> Wolfgang
>>>>
>>>> -O
M, Viechtbauer Wolfgang (SP)
>>>> wrote:
>>>>> Ah, I think you are referring to this part from ?lm:
>>>>>
>>>>> "(including the case that there are w_i observations equal to y_i and the
>>>>> data have been summarized)&
;>> data have been summarized)"
>>>>
>>>> I see; indeed, I don't think this is what 'weights' should be used for
>>>> (the other part before that is correct). Sorry, I misunderstood the point
>>>> you were trying to make.
>&
; Using 'weights' is not meant to indicate that the same observation is
>>> repeated 'n' times. It is meant to indicate different variances (or to
>>> be precise, that the variance of the last observation in 'x' is
>>> sigma^2 / n, while the
t; -Original Message-
>> From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie ten
>> Cate
>> Sent: Sunday, 08 October, 2017 14:55
>> To: r-devel@r-project.org
>> Subject: [Rd] Discourage the weights= option of lm with summarized data
>>
t;
> Best,
> Wolfgang
>
> -Original Message-
> From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie ten
> Cate
> Sent: Sunday, 08 October, 2017 14:55
> To: r-devel@r-project.org
> Subject: [Rd] Discourage the weights= option of lm with summarized
orry, I misunderstood the point you were
trying to make.
Best,
Wolfgang
-Original Message-
From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie ten Cate
Sent: Sunday, 08 October, 2017 14:55
To: r-devel@r-project.org
Subject: [Rd] Discourage the weights= option of lm wit
rvation in 'x' is
sigma^2 / n, while the first three observations have variance
sigma^2).
Best,
Wolfgang
-Original Message-
From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie ten Cate
Sent: Saturday, 07 October, 2017 9:36
To: r-devel@r-project.org
Subje
ance sigma^2).
Best,
Wolfgang
-Original Message-
From: R-devel [mailto:r-devel-boun...@r-project.org] On Behalf Of Arie ten Cate
Sent: Saturday, 07 October, 2017 9:36
To: r-devel@r-project.org
Subject: [Rd] Discourage the weights= option of lm with summarized data
In the Details sectio
In the Details section of lm (linear models) in the Reference manual,
it is suggested to use the weights= option for summarized data. This
must be discouraged rather than encouraged. The motivation for this is
as follows.
With summarized data the standard errors get smaller with increasing
numbers
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