[REBOL] Re: Edit Distance Function?
From: garymiller:starband at: 19-Jul-2002 11:39
> I just hacked this up, and tested it only very lightly.
> You can use it, in trade for testing it for me. :)
> I could write a much better version given some time, but
> going off the references I found, this came together
> quickly. It's going to be slow though, and has high space
> complexity. A better version will take a little more
> time, which I don't have much of at the moment. If you
> can verify that this works correctly, then I can use it
> as a reference for future development of an improved
> version.
Greg, fantastic job on the edit-distance function! And so
quickly. I was amazed!
Support on this mailing list is nothing short of phenomenal!
I am including my test script and results. The program
appears to work great with everything I threw at it! I
threw around 40 strings at it some quite large and didn't
exceed a second of run time on a 1Ghz Dell Pentium.
I have an ascii text dictionary with 100,000 words that I'm
going to use edit-distance with to find the closest words
to any misspelled words in the user's input sentence.
Thanks again Greg, and if any optimizations come to you on
the speed I would much appreciate hearing from you!
etest: func [arg1 arg2] [ print [arg1 " / " arg2 " / "
(edit-distance arg1 arg2)]]
print now/time
etest "a" "b"
etest "am" "at"
etest "i" "I"
etest "Gregg" "Greg"
etest "Gregg" "Gary"
etest "Gregg" "Hirschberg"
etest "Do you enjoy fishing" "Do you like to fish"
etest "Do you enjoy fishing" "Do you like to hunt"
etest "how are you" "how are you today"
etest "how have you been" "how've you been"
etest "how much was it" "how much did it cost"
etest "how much was it" "how much did you pay for it"
etest "how old are you" "how old're you now"
etest "I'm broke" "I'm busted"
etest "I'm broke" "I'm out of money"
etest "I'm trying to quit" "I am trying to quit!"
etest "I'm trying to quit" "I'm attempting to quit"
etest "I'm trying to quit" "I'd like to quit"
etest "I'm trying to quit" "I want to stop"
etest "Let's take a break" "Let's take a breather"
etest "Let's take a walk" "Let's go for a walk"
etest "That's good!" "That's bad!"
etest "That's good!" "That fantastic"
etest "That's stupid" "That sucks!"
etest "the" "teh"
etest "what're you having for lunch today" "what are you
eating for lunch"
etest "what're you having for lunch today" "what're you
going to have for lunch today"
etest "what day is it" "hat day is it"
etest "what is you name" "what's your name"
etest "what time is it" "what is the time"
etest "what time is it" "what time is it now"
etest "what time is it" "whattimeisit"
etest "what time is it" "what time was it"
etest "where do you live?" "Where do yo reside"
etest "you're crazy" "you are crazy"
etest "you're crazy" "you must be crazy"
print now/time
11:29:13
a / b / 0
am / at / 1
i / I / 0
Gregg / Greg / 1
Gregg / Gary / 4
Gregg / Hirschberg / 6
Do you enjoy fishing / Do you like to fish / 9
Do you enjoy fishing / Do you like to hunt / 10
how are you / how are you today / 6
how have you been / how've you been / 3
how much was it / how much did it cost / 8
how much was it / how much did you pay for it / 14
how old are you / how old're you now / 6
I'm broke / I'm busted / 4
I'm broke / I'm out of money / 10
I'm trying to quit / I am trying to quit! / 3
I'm trying to quit / I'm attempting to quit / 6
I'm trying to quit / I'd like to quit / 6
I'm trying to quit / I want to stop / 11
Let's take a break / Let's take a breather / 4
Let's take a walk / Let's go for a walk / 6
That's good! / That's bad! / 3
That's good! / That fantastic / 10
That's stupid / That sucks! / 7
the / teh / 2
what're you having for lunch today / what are you eating
for lunch / 10
what're you having for lunch today / what're you going to
have for lunch today / 11
what day is it / hat day is it / 1
what is you name / what's your name / 3
what time is it / what is the time / 9
what time is it / what time is it now / 4
what time is it / whattimeisit / 3
what time is it / what time was it / 2
where do you live? / Where do yo reside / 6
you're crazy / you are crazy / 2
you're crazy / you must be crazy / 7
11:29:13
11:29:13 >>
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