如何使变量$f定义从列号3打印多少"Freq“？

Question

我需要你帮我写bash脚本。我对代码有问题：

for v in $(seq 1 $f)); do echo $(grep "Freq" freq.log) | awk '{print$3}')

因为这需要打印$f乘以列号3，所以应该打印列号3的"Freq"的$f值。

它看起来像是

enter image description here应该类似于enter image description here

我不知道如何让变量$f定义从第3列打印多少"Freq"。在这个文件中，我有很多"Freq"表达式，但我只需要$f。

确保我粘贴了脚本的所有内容：

#!/bin/bash

e=$(grep "atomic number" freq.log | tail -1 | awk '{print$2}')
echo "Liczba atomow znajdujacyh sie w podanej czasteczce wynosi: $e"

f=$(bc  <<< "($e*3-6)/3")
echo "Liczba wartosci Freq, ktore wczyta skrypt to $f"

for v in $(seq 1 $f); do
echo "$(grep "Freq" freq.log | awk '{print$3}')"
done

样例输入数据文件；以高斯表示的几何图形优化计算

      A                      A                      A
 Frequencies --    182.1477               202.8948               227.7144
 Red. masses --      6.6528                 8.2622                 6.3837
 Frc consts  --      0.1300                 0.2004                 0.1950
 IR Inten    --      0.8602                 0.4870                 1.2090

NAtoms=   35 NActive=   35 NUniq=   35 SFac= 1.00D+00 NAtFMM=   60 NAOKFM=F Big=F

Answer 1

下面是转换为单个awk脚本的bash脚本：

awk脚本script.awk

/atomic number/{               # for each line matching regEx pattern "atomic number"
  e = $2;                      # store current 2nd field in variable e
}
/Freq/{                        # for each line matching regEx pattern "Freq"
  freqArr[fr++]=$3;            # add 3rd field to array freqArr, increment array counter fr
}
END {                          # on complete scanning input file
  print "Liczba atomow znajdujacyh sie w podanej czasteczce wynosi: " e;
  f = ( ((e * 3) - 6) / 3 );   # claculate vairable f
  print "Liczba wartosci Freq, ktore wczyta skrypt to " f;

  for (currFreq in freqArr) {   # scan all element freqArr  
    if (currFreq == f)          # if currFreq equals f
      freqCount++;              # increment freqCount coutner
  }
  print freqCount;
}

运行命令

awk -f script.awk freq.log