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arrays - 按唯一和最大值过滤文件；将两个数组组合成哈希

问题描述

我需要在一个列中按唯一属（物种名称的第一部分）提取，但当具有多个同名时，在 CSV 文件的另一列中提取最大数字。

因此，如果有多个属（相同的名字），则在最后一列中取最大的数字来选择代表该属的那个。

我已将信息提取到数组中，但我无法将两者结合起来进行选择。我正在使用 https://perlmaven.com/unique-values-in-an-array-in-perl 来提供帮助，但是当具有相同的属情况时，我需要在最后一列中包含最大的数字。

use strict;
use warnings;

open taxa_fh, '<', "$ARGV[0]" or die qq{Failed to open "$ARGV[0]" for input: $!\n};

open match_fh, ">$ARGV[0]_genusLongestLEN.csv" or die qq{Failed to open for output: $!\n};my @unique;

my %seen;
my %hash;

while ( my $line = <taxa_fh> ) {
   chomp( $line );
   my @parts = split( /,/, $line );
   my @name = split( / /, $parts[3]);
   my @A = $name[0];
   my @B = $parts[5];
   @seen{@A} = ();
   my @merged = (@A, grep{!exists $seen{$_}} @B);
   my @merged = (@A, @B);
   @hash{@A} = @B;
   print "$line\n";
}

close taxa_fh;
close match_fh;

输入示例：

AB179735.1.1711,AB179735.1.1711,278983,Eucyrtidium hexagonatum,0,1600
AB179736.1.1725,AB179736.1.1725,278986,Pterocorys zancleus,0,1763
AB181888.1.1758,AB181888.1.1758,281609,Protoperidinium crassipes,0,1700
AB181890.1.1709,AB181890.1.1709,281610,Protoperidinium denticulatum,0,1800
AB181892.1.1738,AB181892.1.1738,281611,Protoperidinium divergens,0,1800
AB181894.1.1744,AB181894.1.1744,281612,Protoperidinium leonis,0,1500
AB181899.1.1746,AB181899.1.1746,281613,Protoperidinium pallidum,0,1600
AB181902.1.1741,AB181902.1.1741,261845,Protoperidinium pellucidum,0,1750
AB181904.1.1734,AB181904.1.1734,281614,Protoperidinium punctulatum,0,1599
AB181907.1.1687,AB181907.1.1687,281615,Protoperidinium thorianum,0,1600
AB120001.1.1725,AB120001.1.1725,244960,Gyrodinium spirale,0,1500
AB120002.1.1725,AB120002.1.1725,244961,Gyrodinium fusiforme,0,1800
AB120003.1.1724,AB120003.1.1724,244962,Gyrodinium rubrum,0,1700
AB120004.1.1723,AB120004.1.1723,244963,Gyrodinium helveticum,0,1500
AB120309.1.1800,AB120309.1.1800,4442,Camellia sinensis,0,1700

想要的输出：

AB179735.1.1711,AB179735.1.1711,278983,Eucyrtidium hexagonatum,0,1600
AB179736.1.1725,AB179736.1.1725,278986,Pterocorys zancleus,0,1763
AB181890.1.1709,AB181890.1.1709,281610,Protoperidinium denticulatum,0,1800
AB120002.1.1725,AB120002.1.1725,244961,Gyrodinium fusiforme,0,1800
AB120309.1.1800,AB120309.1.1800,4442,Camellia sinensis,0,1700

标签： arraysperlhash

解决方案

use Text::CSV_XS qw( );

my $csv = Text::CSV_XS->new({
   auto_diag   => 2,
   binary      => 1,
   quote_space => 0,
});

my %by_genus;
while ( my $row = $csv->getline(\*ARGV) ) {
   my ($genus) = split(' ', $row->[3]);
   $by_genus{$genus} = $row
      if !$by_genus{$genus}
      || $row->[5] > $by_genus{$genus}[5];
}

$csv->say(select(), $_) for values(%by_genus);

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