Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Please read this documentation to help you learn: perlfunc, perlretut, perlreftut, perlre.
#!/usr/bin/perl use strict; use warnings; my %sequences; # read the input files, passing in a filename and # a reference to the sequences hash read_file("file1", \%sequences); read_file("file2", \%sequences); # write the output file, passing in a filename and # a reference to the sequences hash write_file("file3", \%sequences); sub read_file { my $filename = shift; my $seqref = shift; open SEQFILE, "<$filename" or die "can't open $filename: $!"; # use greater-than for record separator # see perldoc perlvar local $/ = ">"; while(my $line = <SEQFILE>) { # the data will match a word, followed by a # newline, followed by another word # see perldoc perlretut and perlre if ($line =~ m/(\w+)\n(\w+)/s) { # the first word captured is the name my $name = $1; # the second word captured is the sequence my $sequence = $2; # add the sequence on to what ever is # already there $seqref->{$name} .= $sequence; } } close SEQFILE; } sub write_file { my $filename = shift; my $seqref = shift; open OUTPUT, ">$filename" or die "can't open $filename: $!"; # write the sequences hash to the output file for my $key (sort keys %{$seqref}) { print OUTPUT ">$key\n$seqref->{$key}\n" or die "can't write: $!"; } close OUTPUT or die "can't close $filename: $!"; } __END__

In reply to Re: how to merge the files of DNA sequences? by beable
in thread how to merge the files of DNA sequences? by newperler

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (3)
As of 2023-02-04 03:11 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    I prefer not to run the latest version of Perl because:







    Results (30 votes). Check out past polls.

    Notices?