[Bioperl-l] Bio::TreeIO - tree object to string

[Daniel Gerlach]

Dear all,

This is a very basic question. I have a tree object in $tree and want to 
save its newick representation in a variable as a string:

my $out = new Bio::TreeIO(-fh => $tree_string, -format => 'newick');
$out->write_tree($tree);
print $tree_string;

Unfortunately this does not work and he prints out the newick tree on 
stdout plus the message "Use of uninitialized value in print at ...". He 
also prints out the tree on the stdout if I remove the line "print 
$tree_string". The variable $tree_string seems to be empty.

D.