Manipulating columns in awk

[fcolassie]

Hi,

I have just started to learn awk and I am alreadt facing a problem. I have to following columns:
0 0 0 22.32
15 0 0 16.2
75 0 0 18.48
140 0 0 17.94
180 0 0 16.72
240 0 0 18
300 0 0 16.8
360 0 0 16.79
420 0 0 19.58
480 0 0 19.53

How can I extract only rows for which column 1 equals 15 and 75?
Thanks in advance

 

[dickiebird]

try :
awk '/^15|^75/' yourfile > newfile


Dickie Bird (-)))

 

[aigles]

dickiebird, your command extract too much lines (155 for exemple)

awk '$1 ~ /^(15|75)$/' yourfile > newfile
or
awk '$1 == 15 || $1 == 75' yourfile > newfile

Jean Pierre.

 

[dickiebird]

Ooops - missed out the space !
awk '/^15 |^75 /' yourfile > newfile


Dickie Bird (-)))

 

[fcolassie]

Thanx guys. I used the && instead of || option.