Hello monks, I have a file containing lines such as the following : 
Q3KIL4_PSEPF    ONE    134    380    1    252    216.3    6.3e-64
Q3M236_ANAVT    TWO    107    563    1    468    203.2    5.3e-60
Q3M236_ANAVT    THREE    250    494    1    277    219.1    8.6e-65
Q3M5F5_ANAVT    FOUR    296    608    1    355    166.2    7.4e-49
Q3M5F5_ANAVT    FIVE    299    584    1    304    188.2    1.7e-55
Q3M7Z1_ANAVT    SIX    51    181    1    140    99.0    1.2e-28
Q3MAD2_ANAVT    SEVEN    107    508    1    468    350.1    3.3e-104
Q3MAD2_ANAVT    EIGHT    230    457    1    277    201.1    2.3e-59
Q3MBT3_ANAVT    NINE    203    606    1    468    102.5    1.1e-29
Q3MBT3_ANAVT    TEN    326    559    1    277    221.6    1.6e-65
Q3MBT3_ANAVT    ELEVEN    134    333    1    234    -334.1    2.7e-44
Q3MD63_ANAVT    TWELVE    173    491    1    355    248.5    1.2e-73

[download]

I will use the characteristic ID, to describe the following:
Q3KIL4_PSEPF
Q3M236_ANAVT
Q3M236_ANAVT
Q3M5F5_ANAVT
Q3M5F5_ANAVT
Q3M7Z1_ANAVT
Q3MAD2_ANAVT
Q3MAD2_ANAVT
Q3MBT3_ANAVT
Q3MBT3_ANAVT
Q3MBT3_ANAVT
Q3MD63_ANAVT

[download]

and the characteristic EVALUE, to describe the following:
6.30E-064
5.30E-060
8.60E-065
7.40E-049
1.70E-055
1.20E-028
3.30E-104
2.30E-059
1.10E-029
1.60E-065
2.70E-044
1.20E-073

[download]
So we are interested mainly in the pair ID->EVALUE.
All the data are separated with tabs.
I want to do 2 things:
1) Create a file that has lines that begin with different ids, i.e combine the lines that begin with the same id, and get:
Q3KIL4_PSEPF    ONE    134    380    1    252    216.3    6.3e-64
Q3M236_ANAVT    TWO    107    563    1    468    203.2    5.3e-60    T
+HREE    250    494    1    277    219.1    8.6e-65
Q3M5F5_ANAVT    FOUR    296    608    1    355    166.2    7.4e-49    
+FIVE    299    584    1    304    188.2    1.7e-55
Q3M7Z1_ANAVT    SIX    51    181    1    140    99.0    1.2e-28
Q3MAD2_ANAVT    SEVEN    107    508    1    468    350.1    3.3e-104  
+  EIGHT    230    457    1    277    201.1    2.3e-59
Q3MBT3_ANAVT    NINE    203    606    1    468    102.5    1.1e-29    
+TEN    326    559    1    277    221.6    1.6e-65    ELEVEN    134   
+ 333    1    234    -334.1    2.7e-44
Q3MD63_ANAVT    TWELVE    173    491    1    355    248.5    1.2e-73

[download]

2)Create a file that holds only one id per line and, if I have more than one lines that begin with the same id, hold the line with the smallest evalue, i.e get the file : 
Q3KIL4_PSEPF    ONE    134    380    1    252    216.3    6.3e-64
Q3M236_ANAVT    THREE    250    494    1    277    219.1    8.6e-65
Q3M5F5_ANAVT    FIVE    299    584    1    304    188.2    1.7e-55
Q3M7Z1_ANAVT    SIX    51    181    1    140    99.0    1.2e-28
Q3MAD2_ANAVT    SEVEN    107    508    1    468    350.1    3.3e-104
Q3MBT3_ANAVT    TEN    326    559    1    277    221.6    1.6e-65
Q3MD63_ANAVT    TWELVE    173    491    1    355    248.5    1.2e-73

[download]

Please, give me some help how to begin and what to use, I am newbie in Perl...
Thank you all in advance!

In reply to how to combine? by Anonymous Monk

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