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| author | aarne <unknown> | 2005-11-01 08:20:09 +0000 |
|---|---|---|
| committer | aarne <unknown> | 2005-11-01 08:20:09 +0000 |
| commit | 27c65e985d1a0c23978239bd52342c766964b98b (patch) | |
| tree | 66071f0b6ab585bf9941ff9fd819c684b838c1e8 /doc | |
| parent | a48236172fc24f32792d56675b0ef682d6119348 (diff) | |
doc of prob
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/gf-history.html | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/gf-history.html b/doc/gf-history.html index 193b18a50..5a50baa46 100644 --- a/doc/gf-history.html +++ b/doc/gf-history.html @@ -12,11 +12,24 @@ Changes in functionality since May 17, 2005, release of GF Version 2.2 </center> +1/11 (AR) Yet another method for adding probabilities: append +<tt> --# prob Double</tt> to the end of a line defining a function. +This can be (1) a <tt>.cf</tt> rule (2) a <tt>fun</tt> rule, or +(3) a <tt>lin</tt> rule. The probability is attached to the +first identifier on the line. + +<p> + 31/10 (AR) Probabilistic grammars. Probabilities can be used to weight random generation (<tt>gr -prob</tt>) and to rank parse results (<tt>p -prob</tt>). They are read from a separate file (flag <tt>i -probs=File</tt>, format <tt>--# prob Fun Double</tt>) or from the top-level grammar file itself (option <tt>i -prob</tt>). +<br> +As a by-product, the probabilistic random generation algorithm is +available for any context-free abstract syntax. Use the flag +<tt>gr -cf<&tt>. This algorithm is much more efficient than the +old (more general) one. <p> |