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- cat file
- 0.000 0.0 425.2 2.23
- 0.000 0.0 477.9 0.91
- 0.000 0.0 516.5 -0.41
- 0.000 0.0 566.5 -3.72
- awk 'NR==1 {print $3}' file
- awk '{NR==1 { temp=$3 } NR>1 { /* do stuff that refers to temp */ }' /path/to/file
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