AnsweredAssumed Answered

Exp function to get antilog

Question asked by aug_aug on Oct 9, 2014
Latest reply on Oct 9, 2014 by Dan_Patterson

I am trying to take some result values and log transform them with the field calculator, then krig them to a surface - I found this in the help regarding the log function:

 

"field calculator uses the natural Log not Log10(x)

try;

Log ( [Area] ) / Log ( 10 )"

 

I did that and it seemed to work, but how do I calculate the antilog or exp back correctly of the surface, I can't seem to get back to values that correlate to my original data (which ranges from 0.00001 to 0.003047) - I run:

 

Exp("log_krig")

 

in the raster calculator and end up with values of 0.00252001 to 0.0755711...I'm wondering if there's a reverse of the above trick to get the antilog of my surface somehow (i.e. get back from Log transformed data to original)? My mathematics are not strong...thanks for any help!

Outcomes