PLoS supp. material by Hermann Cuntz
this is a meta-function
Morphs the metrics of tree intree without changing angles or topology
(see introduction section “morphing a tree”).
Attributes length values from Nx1 vector v
to the individual segments but keeps the branching structure otherwise intact.
This can result in overlap between previously non-overlapping segments
or extreme sparseness depending on intree and v.
This function provides universal application to all possible morpho-electrotonic transforms and much more.
If the original lengths of segments are backed up in a vector len,
the original tree can simply be recovered by:
originaltree = morph_tree (morphedtree, len);
However of course, 0-length segments cannot be regrown.
map new (random) lengths on the topology, conserving the angles
>> morph_tree (sample2_tree, randn(15, 1)*5 + 10)
see demo movie with option '-m'
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