我想比较从这个样本数据中分离出来的两个数字:
'gi|112807938|emb|CU075707.1|_Xenopus_tropicalis_finished_cDNA,_clone_TNeu129d01 C1:TCONS_00039972(XLOC_025068),_12.9045:32.0354,_Change:1.3118,_p:0.00025,_q:0.50752 C2:TCONS_00045925(XLOC_029835),_10.3694:43.8379,_Change:2.07985,_p:0.0004,_q:0.333824',
'gi|115528274|gb|BC124894.1|_Xenopus_laevis_islet-1,_mRNA_(cDNA_clone_MGC:154537_IMAGE:8320777),_complete_cds C1:TCONS_00080221(XLOC_049570),_17.9027:40.8136,_Change:1.18887,_p:0.00535,_q:0.998852 C2:TCONS_00092192(XLOC_059015),_17.8995:35.5534,_Change:0.990066,_p:0.0355,_q:0.998513',
'gi|118404233|ref|NM_001078963.1|_Xenopus_(Silurana)_tropicalis_pancreatic_lipase-related_protein_2_(pnliprp2),_mRNA C1:TCONS_00031955(XLOC_019851),_0.944706:5.88717,_Change:2.63964,_p:0.01915,_q:0.998852 C2:TCONS_00036655(XLOC_023660),_2.31819:11.556,_Change:2.31757,_p:0.0358,_q:0.998513',
使用以下正则表达式:
#!/usr/bin/perl -w
use strict;
use File::Slurp;
use Data::Dumper;
$Data::Dumper::Sortkeys = 1;
my (@log_change, @largest_change);
foreach (@intersect) {
chomp;
my @condition1_match = ($_ =~ /C1:.*?Change:(-?\d+\.\d+)|C1:.*?Change:(-?inf)/); # Sometimes the value is 'inf' or '-inf'. This allows either a numerical or inf value to be captured.
my @condition2_match = ($_ =~ /C2:.*?Change:(-?\d+\.\d+)|C2:.*?Change:(-?inf)/);
push @log_change, "@condition1_match\t@condition2_match";
}
print Dumper (\@log_change);
这给出了这个输出:
'1.3118 2.07985 ',
'1.18887 0.990066 ',
'2.63964 2.31757 ',
理想情况下,在同一个循环中,我现在想对保存的值进行比较,@condition1_match
以便@condition2_match
将较大的值推送到新数组中,除非与非数字“inf”进行比较,在这种情况下推送数值。
像这样的东西:
my (@log_change, @largest_change);
foreach (@intersect) {
chomp;
my @condition1_match = ($_ =~ /C1:.*?Change:(-?\d+\.\d+)|C1:.*?Change:(-?inf)/);
my @condition2_match = ($_ =~ /C2:.*?Change:(-?\d+\.\d+)|C2:.*?Change:(-?inf)/);
push @log_change, "@condition1_match\t@condition2_match";
unless ($_ =~ /Change:-?inf/) {
if (@condition1_match > @condition2_match) {
push @largest_change, @condition1_match;
}
else {
push @largest_change, @condition2_match;
}
}
}
print Dumper (\@largest_change);
这使:
'2.07985',
undef,
'0.990066',
undef,
'2.31757',
undef,
以及很多这样的错误信息:
Use of uninitialized value $condition2_match[1] in join or string at intersect.11.8.pl line 114.
我不确定错误消息的确切含义,以及为什么我在我的@largest_change