Re: [R] dummy encoding in metafor

2013-01-28 Thread Alma Wilflinger
have to take the variances from the new column from CMA? kind regards, alma From: Viechtbauer Wolfgang (STAT) t.co.uk>; "r-help@r-project.org" Sent: Monday, January 28, 2013 10:38 AM Subject: RE: [R] dummy encoding in metafor Dear Alma, eith

Re: [R] dummy encoding in metafor

2013-01-28 Thread Viechtbauer Wolfgang (STAT)
al to 1!) Best, Wolfgang > -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf Of Alma Wilflinger > Sent: Sunday, January 27, 2013 21:52 > To: Michael Dewey; r-help@r-project.org > Subject: Re: [R] dummy encoding in

Re: [R] dummy encoding in metafor

2013-01-27 Thread Alma Wilflinger
From: Michael Dewey t.co.uk>; "r-help@r-project.org" Sent: Thursday, January 24, 2013 6:57 PM Subject: Re: [R] dummy encoding in metafor At 22:06 23/01/2013, Alma Wilflinger wrote: > Hi Michael, > > The supervisor for my Master's Thesis told me that my m

Re: [R] dummy encoding in metafor

2013-01-24 Thread Michael Dewey
0:22 AM Subject: Re: [R] dummy encoding in metafor At 08:30 23/01/2013, Alma Wilflinger wrote: > Dear Wolfgang and Michael, > > thank you very much for your help! > > Concerning the Variance: I took the variance I used for CMA (which is always 1), so I think it should be the right

Re: [R] dummy encoding in metafor

2013-01-23 Thread Alma Wilflinger
chtba...@maastrichtuniversity.nl>; Michael Dewey ; "r-help@r-project.org" Sent: Wednesday, January 23, 2013 10:22 AM Subject: Re: [R] dummy encoding in metafor At 08:30 23/01/2013, Alma Wilflinger wrote: > Dear Wolfgang and Michael, > [[elided Yahoo spam]] > > Concerning the Varian

Re: [R] dummy encoding in metafor

2013-01-23 Thread Alma Wilflinger
From: Viechtbauer Wolfgang (STAT) To: Michael Dewey ; Alma Wilflinger ; "r-help@r-project.org" Sent: Monday, January 21, 2013 11:10 AM Subject: RE: [R] dummy encoding in metafor As Michael already mentioned, the error: Error in qr.solve(

Re: [R] dummy encoding in metafor

2013-01-23 Thread Michael Dewey
; "r-help@r-project.org" Sent: Monday, January 21, 2013 11:10 AM Subject: RE: [R] dummy encoding in metafor As Michael already mentioned, the error: Error in qr.solve(wX, diag(k)) : singular matrix 'a' in solve indeed indicates that your design matrix is not of full rank (i.e

Re: [R] dummy encoding in metafor

2013-01-21 Thread Viechtbauer Wolfgang (STAT)
m: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf Of Michael Dewey > Sent: Monday, January 21, 2013 10:40 > To: Alma Wilflinger; Michael Dewey; r-help@r-project.org > Subject: Re: [R] dummy encoding in metafor > > At 14:48 20/01/2013, Alma Wil

Re: [R] dummy encoding in metafor

2013-01-21 Thread Michael Dewey
hensive meta analysis) but one of the benefits of R is that I am able to test multiple moderators at once - at least as I was told. kind regards, Alma From: Michael Dewey To: Alma Wilflinger ; "r-help@r-project.org" Sent: Sunday, January 20, 2013 12:52 PM Subject: Re: [R] dumm

Re: [R] dummy encoding in metafor

2013-01-20 Thread Alma Wilflinger
d in CMA (comprehensive meta analysis) but one of the benefits of R is that I am able to test multiple moderators at once - at least as I was told. kind regards, Alma ____________ From: Michael Dewey r-project.org> Sent: Sunday, January 20, 2013 12:52 PM Subject: Re: [R] d

Re: [R] dummy encoding in metafor

2013-01-20 Thread Michael Dewey
At 17:14 19/01/2013, Alma Wilflinger wrote: Hi, I am quite new to R and in need of some advice. I am trying to conduct a meta regression over a some studies with about 7 mod variables which I have to dummy encode. Alma, although you can generate your own dummy variables by hand you do not h