Bioequivalence and Bioavailability Forum • modified function for selection of time points

modified function for selection of time points [🇷 for BE/BA]

posted by Aceto81 – Belgium, 2008-10-16 14:09 (6038 d 15:19 ago) – Posting: # 2542
Views: 19,808

❝ Do you think that we need to take the absolute value for AIC (extractAIC) here? :confused: AICs can be negative and the smallest is the best, as far as I can remember. I know that these codes were written by Ace previously. What do you think about this?

❝ return(cbind((nrow(dat)-m+1),abs(extractAIC(lm(log(conc)~time,dat[m:nrow(dat),])))[2],summary(lm(log(conc)~time,dat[m:nrow(dat),]))$adj.r.squared))

Maybe a bit of clarification for the abs() value:
I took the example from a thread, mentioned before, and get the same AIC values, except that they were negative. So that's the reason why I used the abs() value.

Ace

Complete thread:

update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-17 13:33
- update: bear v1.1.4 for R (a free tool for ABE) Helmut 2008-09-17 16:59
  - update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-17 21:03
- update: bear v1.1.4 for R (a free tool for ABE) martin 2008-09-19 13:13
  - update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-22 18:19
  - update: bear v1.1.4 for R (a free tool for ABE) Helmut 2008-09-23 00:46
    - update: bear v1.1.4 for R (a free tool for ABE) martin 2008-09-27 09:37
      - Package lee for R Helmut 2008-09-27 14:05
  - update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-23 10:07
    - update: bear v1.1.4 for R (a free tool for ABE) martin 2008-09-27 09:25
      - update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-29 12:03
        
        update: bear v1.1.4 for R (a free tool for ABE) Helmut 2008-09-29 12:10
        
        update: bear v1.1.4 for R (a free tool for ABE) yjlee168 2008-09-29 13:07
        
        modified function for selection of time points martin 2008-10-11 15:30
        
        modified function for selection of time points yjlee168 2008-10-11 19:45
        
        last 3 time points martin 2008-10-12 00:04
        
        modified function for selection of time points yjlee168 2008-10-16 11:20
        
        modified function for selection of time pointsAceto81 2008-10-16 12:09
        
        modified code martin 2008-10-16 12:29
        
        modified code Aceto81 2008-10-16 14:11
        
        abs(AIC) martin 2008-10-16 15:03
        example martin 2008-10-16 20:02
        
        example Aceto81 2008-10-17 12:30