automaton.rweight.ipynb

Kernel: Python 3

automaton.rweight(weight, algo="auto")

The right scalar product of an automaton by a weight.

For consistency reasons with other operations, the algo parameter can be one of these:

• "auto"

• "general"

• "standard"

However, due to how the scalar product works, this makes no difference.

Postconditions:

• when applied to standard automata, the result is standard.

See also:

• automaton.lweight

• automaton.multiply

import vcsn
a = vcsn.context('lal_char, q').expression('<2>a<3>bc', 'none').standard()
a

a.rweight(a.context().weight('5'))

Instead of a.rweight(a.context().weight('5')), you may write a * 5.

a * 5

To force the execution of the general algorithm you can do it this way.

a.rweight(a.context().weight('5'), 'general')

However, apart from the multiplication by 0, there is no difference with the standard algorithm.