Thanks Jose, but I doubt that the author of these analysis used such a
"complex" approach.

Arnaud


2012/12/13 Jose Iparraguirre <Jose.Iparraguirre@ageuk.org.uk>

>  Sorry, Arnaud, I misinterpreted the question.****
>
> There isn’t a built-in option in lm or glm to run pairwise deletion, but
> in the ‘psych’ package you can run regressions on covariance matrices
> rather than on raw data. So, first, you can obtain a covariance matrix by
> cov() with the option use="pairwise.complete.obs" –or within ‘psych’,
> set.cor(…,use="pairwise"), which will give you the correlations pairwise,
> and then you use the function mat.regress using the pairwise matrix.****
>
> Hope this helps,****
>
> ** **
>
> José ****
>
> ** **
>
> ** **
>
> *From:* Arnaud Mosnier [mailto:a.mosnier@gmail.com]
> *Sent:* 13 December 2012 16:13
> *To:* Jose Iparraguirre
> *Cc:* r-help@r-project.org
> *Subject:* Re: [R] Pairwise deletion in a linear regression and in a GLM ?
> ****
>
> ** **
>
> Hi Jose,
>
> To my perception na.omit is different from a pairwise deletion.
> With na.omit, you omit totally that case if there is a missing value for
> one of the variable you consider in the model.
> In the pairwise deletion, the case with some missing value is kept and
> values that are not missing are used in the statistics calculations.
>
> However, I agree that pairwise deletion is not good practice (so it would
> be surprising that it is the default in lm !!).
> I just when to be able to recalculate the statistics given in this thesis.
>
> Arnaud
>
>   ****
>
> ** **
>
> 2012/12/13 Jose Iparraguirre <Jose.Iparraguirre@ageuk.org.uk>****
>
> Hi Arnaud,
>
> A quick help search of lm or glm tells you that 'the "factory-fresh"
> default is na.omit'.
> If you then look up 'na.omit', you'll read that it 'returns the object
> with incomplete cases removed'.
> So, pairwise deletion is the default option in both lm and glm.
>
> On a related note, it goes without saying that pairwise deletion is not
> good practice in most cases, and that R has ways to impute these missing
> cases depending on assumptions regarding the cause or nature of their
> missingness.
>
> Regards,
>
> José
>
>
> José Iparraguirre
> Chief Economist
> Age UK****
>
>
>
>
>
> -----Original Message-----
> From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org]
> On Behalf Of Arnaud Mosnier
> Sent: 13 December 2012 15:40
> To: r-help@r-project.org
> Subject: [R] Pairwise deletion in a linear regression and in a GLM ?
>
> Dear useRs,
>
> In a thesis, I found a mention of the use of pairwise deletion in linear
> regression and GLM (binomial family).
> The author said that he has used R to do the statistics, but I did not find
> the option allowing pairwise deletion in both lm and glm functions. Is
> there somewhere a package allowing that ?
>
> Thanks,
>
> Arnaud****
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
> Wrap Up and Run 10k is back!
>
> Also, new for 2013 – 2km intergenerational walks at selected venues. So
> recruit a buddy, dust off the trainers and beat the winter blues by
> signing up now:
>
> http://www.ageuk.org.uk/10k
>
>                  Milton Keynes | Oxford | Sheffield | Crystal Palace |
> Exeter | Harewood House, Leeds |
>                                  Tatton Park, Cheshire | Southampton |
> Coventry
>
>
>
> Age UK Improving later life
>
> http://www.ageuk.org.uk
>
>
>
>
> -------------------------------
> Age UK is a registered charity and company limited by guarantee,
> (registered charity number 1128267, registered company number 6825798).
> Registered office: Tavis House, 1-6 Tavistock Square, London WC1H 9NA.
>
> For the purposes of promoting Age UK Insurance, Age UK is an Appointed
> Representative of Age UK Enterprises Limited, Age UK is an Introducer
> Appointed Representative of JLT Benefit Solutions Limited and Simplyhealth
> Access for the purposes of introducing potential annuity and health
> cash plans customers respectively.  Age UK Enterprises Limited, JLT
> Benefit Solutions Limited and Simplyhealth Access are all authorised and
> regulated by the Financial Services Authority.
> ------------------------------
>
> This email and any files transmitted with it are confidential and intended
> solely for the use of the individual or entity to whom they are
> addressed. If you receive a message in error, please advise the sender and
> delete immediately.
>
> Except where this email is sent in the usual course of our business, any
> opinions expressed in this email are those of the author and do not
> necessarily reflect the opinions of Age UK or its subsidiaries and
> associated companies. Age UK monitors all e-mail transmissions passing
> through its network and may block or modify mails which are deemed to be
> unsuitable.
>
> Age Concern England (charity number 261794) and Help the Aged (charity
> number 272786) and their trading and other associated companies merged
> on 1st April 2009.  Together they have formed the Age UK Group, dedicated
> to improving the lives of people in later life.  The three national
> Age Concerns in Scotland, Northern Ireland and Wales have also merged with
> Help the Aged in these nations to form three registered charities:
> Age Scotland, Age NI, Age Cymru.
>
>
>
>
>
>
>
>
>
> ****
>
> ** **
>
>
> ------------------------------
> *Wrap Up and Run 10k is back! *
>
> Also, new for 2013 – 2km intergenerational walks at selected venues. So
> recruit a buddy, dust off the trainers and beat the winter blues
> by signing up now:
>
> www.ageuk.org.uk/10k
>
>                                    Milton Keynes | Oxford | Sheffield |
> Crystal Palace | Exeter | Harewood House, Leeds |
>                                                                 Tatton
> Park, Cheshire | Southampton | Coventry
>
>
> *Age UK* Improving later life
>
> www.ageuk.org.uk
>
> -------------------------------
> Age UK is a registered charity and company limited by guarantee,
> (registered charity number 1128267, registered company number 6825798).
> Registered office: Tavis House, 1-6 Tavistock Square, London WC1H 9NA.
>
> For the purposes of promoting Age UK Insurance, Age UK is an Appointed
> Representative of Age UK Enterprises Limited, Age UK is an Introducer
> Appointed Representative of JLT Benefit Solutions Limited and Simplyhealth
> Access for the purposes of introducing potential annuity and health cash
> plans customers respectively. Age UK Enterprises Limited, JLT Benefit
> Solutions Limited and Simplyhealth Access are all authorised and regulated
> by the Financial Services Authority.
>
> ------------------------------
> This email and any files transmitted with it are confidential and intended
> solely for the use of the individual or entity to whom they are addressed.
> If you receive a message in error, please advise the sender and delete
> immediately.
>
> Except where this email is sent in the usual course of our business, any
> opinions expressed in this email are those of the author and do not
> necessarily reflect the opinions of Age UK or its subsidiaries and
> associated companies. Age UK monitors all e-mail transmissions passing
> through its network and may block or modify mails which are deemed to be
> unsuitable.
>
> Age Concern England (charity number 261794) and Help the Aged (charity
> number 272786) and their trading and other associated companies merged on
> 1st April 2009. Together they have formed the Age UK Group, dedicated to
> improving the lives of people in later life. The three national Age
> Concerns in Scotland, Northern Ireland and Wales have also merged with Help
> the Aged in these nations to form three registered charities: Age Scotland,
> Age NI, Age Cymru.
>
> ------------------------------
>

	[[alternative HTML version deleted]]


