1. Shell 脚本中取两个数的百分比
a=20
b=100
#计算百分比
echo `awk 'BEGIN{printf "%.2f%%\n",('$a'/'$b')*100}'`
20.00%
2. perl 脚本中取两个数的百分比
my $gc_count = ($dna_sequence =~ tr/GCgc//); # 计算G和C的数量
my $length = length($dna_sequence);
$gc_content = ($gc_count / $length) * 100
return $length ? $gc_content * 100 : 0; # 计算GC含量百分比
$gc_content = sprint "%.2f%%",$gc_content;
print ">randseq$i\tGC含量: ${gc_content}\n$random_dna\n";
50.00%