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Additional question to "awk to replace particular field"

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# 1  
Old 06-12-2009
Additional question to "awk to replace particular field"
I guess it was getting a little messy on the other post so here goes:
Link to previous post for Question:
https://www.unix.com/shell-programmin...lar-field.html

Continuation of Question
hey i was messing around a bit ... made me wonder...
If the error_correction.txt file had 3 columns,:

VenoM,Venom,Antivenom
nos,NOS,N2O
..
.
.
.


Now Suppose i have an if statement and depending on it i have to choose a value from column 2 or column 3, to replace the value in the main datafile.
How do i do this?
# 2  
Old 06-18-2009
Code:
cat file | awk '{ if (condition_x) $2="new column two" else $3="new column three"; print $0; }' >file.new && mv file.new file

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