**lesionLinks - removes links or sets or adds noise
to their weights
**
### USAGE

lesionLinks <group-list> [-proportion <proportion> |
-value <value> | -range <range> | -multiply | -flat |
-type <link-type>]

### DESCRIPTION

This will lesion incoming links to the groups in one of three ways. The
proportion, which defaults to 1.0, gives the likelihood that each link
will be affected. It is not guaranteed that exactly (100 x proportion)%
of the links will be affected. If a link type is given, only links of
that type will be affected.

With no value or range, the links will be permanently deleted.

With just a value specified, the link weights will be set to this value.
Typically a value of 0.0 would be used.

With a positive range and boolean multiplicative and gaussian values
specified, noise will be introduced in the weights of affected
links. See the help for the command noiseType for an explanation of these
parameters.

When the weight of a link has been changed with this procedure, it is
not possible to restore the previous value. Therefore, be sure to
saveWeights before lesioning the links.

If you may want to recreate the exact same lesion again, be sure to seed
the random number generator before lesioning and record the seed
value.

### EXAMPLES

To remove 50% of all incoming connections to the group "output":

lens> lesionLinks output -p 0.5

To zero all the bias connections to the group "output":

lens> lesionLinks output -v 0 -t bias

To multiply the weights of all links by gaussian noise with a standard
deviation of 0.1:

lens> lesionLinks * -r 0.1 -m

### SEE ALSO

lesionUnits,
noiseType,
freezeWeights

Last modified: Wed Nov 15 11:11:11 EST 2000