Bioequivalence and Bioavailability Forum

OT: log(0) - NaN, NA or what [General Statistics]

posted by d_labes – Berlin, Germany, 2014-03-12 09:59 (4138 d 19:43 ago) – Posting: # 12603
Views: 10,359

Hi nitpickers!

Here the answers from my two statistical systems of choice.

SAS:

 data null;

 x=log(0);

 run;



NOTE: Invalid argument to function LOG at line 40530 column 4.

x=. _ERROR_=1 _N_=1

NOTE: Mathematical operations could not be performed at the following places. The results of the operations have been set to missing values.

Each place is given by: (Number of times) at (Line):(Column).

  1 at 40530:4

. = missing = NA?

R:

>log(0)

[1] -Inf

—
Regards,

Detlew

Complete thread:

Log-transformation of "null" PK parameters fno 2014-03-11 12:18 [General Statistics]
- Non-informative “profiles” Helmut 2014-03-11 13:29
  - Non-informative “profiles” Ohlbe 2014-03-11 13:47
    - Non-informative “profiles” Helmut 2014-03-11 14:04
      - Non-informative “profiles” fno 2014-03-11 15:52
        
        Non-informative “profiles” Helmut 2014-03-11 17:22
        
        Non-informative “profiles” ElMaestro 2014-03-11 18:50
        
        OT: log(0) - NaN, NA or whatd_labes 2014-03-12 08:59
        
        OT: log(0) - NaN, NA, ‘.’, –∞, or empty Helmut 2014-03-12 15:31
        
        Non-informative “profiles” fno 2014-03-12 11:18
        
        Non-informative “profiles” nobody 2014-03-12 13:18

OT: log(0) - NaN, NA or what [General Sta­tis­tics]

Complete thread:

OT: log(0) - NaN, NA or what [General Statistics]