Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Ding, Yuan Chun
insem...@comcast.net] Sent: Monday, March 05, 2018 3:55 PM To: Bert Gunter Cc: Ding, Yuan Chun; r-help@r-project.org Subject: Re: [R] data analysis for partial two-by-two factorial design > On Mar 5, 2018, at 3:04 PM, Bert Gunter wrote: > > But of course the whole point of additivity is to

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread David Winsemius
erated from a partial two-by-two factorial > > > design: two levels for drug A (yes, no), two levels for drug B (yes, no); > > > however, data points are available only for three groups, no drugA/no > > > drugB, yes drugA/n

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Bert Gunter
generated from a partial two-by-two factorial > design: two levels for drug A (yes, no), two levels for drug B (yes, no); > however, data points are available only for three groups, no drugA/no > drugB, yes drugA/no drugB, yes drugA/yes drug B, omitting the fourth group > of no drugA/yes dr

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Bert Gunter
ning > three separate T tests? > > > > > > Thank you so much!! > > > > > > Ding > > > > > > I need to analyze data generated from a partial two-by-two factorial > design: two levels for drug A (yes, no), two levels for drug B (yes, no); >

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread David Winsemius
o levels for drug A (yes, no), two levels for drug B (yes, no); > > however, data points are available only for three groups, no drugA/no > > drugB, yes drugA/no drugB, yes drugA/yes drug B, omitting the fourth group > > of no drugA/yes drugB. I think we can not investigate interacti

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Ding, Yuan Chun
-help-boun...@r-project.org] On Behalf Of Ding, Yuan Chun Sent: Monday, March 05, 2018 2:45 PM To: Bert Gunter; David Winsemius Cc: r-help@r-project.org Subject: Re: [R] data analysis for partial two-by-two factorial design Hi Bert and David, Thank you so much for willingness to spend some time on

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Ding, Yuan Chun
, March 05, 2018 2:27 PM To: David Winsemius Cc: Ding, Yuan Chun; r-help@r-project.org Subject: Re: [R] data analysis for partial two-by-two factorial design David: I believe your response on SO is incorrect. This is a standard OFAT (one factor at a time) design, so that assuming additivity (no

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Bert Gunter
> Replied on CrossValidated where this would be on-topic. > > -- > David, > > > > > > > From: Bert Gunter [mailto:bgunter.4...@gmail.com] > > Sent: Friday, March 02, 2018 12:32 PM > > To: Ding, Yuan Chun > > Cc: r-help@

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread David Winsemius
, > > > From: Bert Gunter [mailto:bgunter.4...@gmail.com] > Sent: Friday, March 02, 2018 12:32 PM > To: Ding, Yuan Chun > Cc: r-help@r-project.org > Subject: Re: [R] data analysis for partial two-by-two factorial design > > > [Atte

Re: [R] data analysis for partial two-by-two factorial design

2018-03-05 Thread Ding, Yuan Chun
= drug A + drug B? any suggestion is appreciated. From: Bert Gunter [mailto:bgunter.4...@gmail.com] Sent: Friday, March 02, 2018 12:32 PM To: Ding, Yuan Chun Cc: r-help@r-project.org Subject: Re: [R] data analysis for partial two-by-two factorial design [Attention

Re: [R] data analysis for partial two-by-two factorial design

2018-03-02 Thread Ding, Yuan Chun
Hi Bert, Thank you so much for your direction, I have asked a question on stackexchange website. Ding From: Bert Gunter [mailto:bgunter.4...@gmail.com] Sent: Friday, March 02, 2018 12:32 PM To: Ding, Yuan Chun Cc: r-help@r-project.org Subject: Re: [R] data analysis for partial two-by-two

Re: [R] data analysis for partial two-by-two factorial design

2018-03-02 Thread Bert Gunter
This list provides help on R programming (see the posting guide linked below for details on what is/is not considered on topic), and generally avoids discussion of purely statistical issues, which is what your query appears to be. The simple answer is yes, you can fit the model as described, but y

Re: [R] data analysis for partial two-by-two factorial design

2018-03-02 Thread Ding, Yuan Chun
Dear R users, I need to analyze data generated from a partial two-by-two factorial design: two levels for drug A (yes, no), two levels for drug B (yes, no); however, data points are available only for three groups, no drugA/no drugB, yes drugA/no drugB, yes drugA/yes drug B, omitting the fourt