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Find lowest value with conditions in CLIPS


Find lowest value with conditions in CLIPS

By : Aaron
Date : November 21 2020, 09:01 AM
wish help you to fix your issue I am making a CLIPS program where I have: , Here's how you can modify the rule to find the cheapest room:
code :
(defrule busca-hoteles

   ;; The city is in the dominica republic

   (pais Rep_Dominicana $? ?ciudad $?)

   ;; The hotel is in the city and 4 stars

   (hotel ?hotel ?ciudad 4)

   ;; There are available standard rooms in the hotel

   (precio ?hotel standar ?price ?habitaciones)
   (test (> ?habitaciones 0))

   ;; There are no other 4 star hotel in the same
   ;; city with available standard rooms and a
   ;; lower price

   (not (and (hotel ?hotel2 ?ciudad 4)
             (precio ?hotel2 standar ?price2 ?habitaciones2)
             (test (> ?habitaciones2 0))
             (test (< ?price2 ?price))))

   =>

   (printout t "Cheapest 4 star hotel in " ?ciudad " is " 
               ?hotel " at " ?price crlf))


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Find FIRST lowest value in table AND date on which that lowest value occurs

Find FIRST lowest value in table AND date on which that lowest value occurs


By : Ray Liu
Date : March 29 2020, 07:55 AM
Hope this helps If I have a table with the following schema: , Simple and fast solution:
code :
SELECT weight, entry_date
FROM   diet_watch
WHERE  entry_date BETWEEN '2001-01-02' AND '2001-01-06'
ORDER  BY 1, 2
LIMIT  1;
SELECT weight, entry_date
FROM  (
    SELECT weight, entry_date
          ,row_number() OVER (ORDER BY weight, entry_date) AS rn
    FROM   diet_watch
    WHERE  entry_date between '2001-01-02' and '2001-01-06'
    ) AS x
WHERE rn = 1;
SELECT weight, entry_date
FROM   diet_watch
WHERE  entry_date BETWEEN '2001-01-02' AND '2001-01-06'
ORDER  BY weight, entry_date
FETCH  FIRST 1 ROWS ONLY;
CLIPS search for a fact matching conditions in RHS

CLIPS search for a fact matching conditions in RHS


By : oppixp
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Use the fact set query functions (section 12.9.12 in the Basic Programming Guide):
code :
CLIPS> 
(deftemplate cell 
   (slot x)
   (slot y)
   (slot type (allowed-values urban rural lake hill gate border)))
CLIPS> 
(deftemplate inspect
   (slot x)
   (slot y))
CLIPS> 
(deffacts example
   (inspect (x 3) (y 3))
   (cell (type urban) (x 1) (y 1))
   (cell (type rural) (x 2) (y 3))
   (cell (type lake) (x 4) (y 4))
   (cell (type border) (x 4) (y 4))
   (cell (type hill) (x 3) (y 5))
   (cell (type gate) (x 3) (y 3)))
CLIPS> 
(defrule inspect
   ; Changed to inspect so the example does
   ; not fire this rule for every cell
   (inspect (x ?xval) (y ?yval))  
   =>
   (do-for-all-facts ((?c cell))
                     (and (<= (- ?xval 1) ?c:x (+ ?xval 1))
                          (<= (- ?yval 1) ?c:y (+ ?yval 1)))
      (printout t ?c:type " " ?c:x " " ?c:y crlf)))
CLIPS> (reset)
CLIPS> (run)
rural 2 3
lake 4 4
border 4 4
gate 3 3
CLIPS>
how can i find from all data i have add one lowest price in CLIPS

how can i find from all data i have add one lowest price in CLIPS


By : Dan C
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I need to find the lowest price from all the data I enter. For example, I have tested the rule contain (defrule lowest and it works but when here it works in a loop). How can I resolve this situation? , Make the following modifications to your rules:
code :
(defrule table
   ?M <- (point ?x1 ?y1) 
   ?K <- (moins ?x2 ?y2)
   =>
   (printout t "donner les infos du chemin " ?x1 ?x2 crlf)
   (printout t "path : ")
   (bind ?p (readline))
   (printout t "distance ")
   (bind ?d (read)) ;; Use read not readline
   (assert (infos ?x1 to ?x2 path ?p distance ?d)))

(defrule lowest
  (declare (salience -10))                               ;; Rule needs to execute last
  (infos ?x1 to ?x2 path ?p distance ?d)
  (not (infos ? to ? path ? distance ?d2&:(< ?d2 ?d)))   ;; Need to match infos facts
  =>
  (printout t "le chemin de " ?x1 " vers " ?x2 ","  ?p " has the lowest price: " ?d crlf))
CLIPS> (assert (debut point))
<Fact-1>
CLIPS> (run)
Combien de point 2
Entrer nbr point 
nom point A
Valeur point 23
Entrer nbr point 
nom point B
Valeur point 34
Combien de moins 1
Entrer nbr moins
nom moins C
Valeur moins 43
donner les infos du chemin AC
path : ABC
distance 3
 path de  AC est: ABC avec une distance de 3
donner les infos du chemin BC
path : BDC
distance 23
 path de  BC est: BDC avec une distance de 23
le chemin de A vers C,ABC has the lowest price: 3
CLIPS> 
Getting wrong lowest value, if I separate the lowest and high (for) loop then I get the correct lowest value

Getting wrong lowest value, if I separate the lowest and high (for) loop then I get the correct lowest value


By : Magnus
Date : March 29 2020, 07:55 AM
Does that help Your code has undefined behaviour, as you're accessing rainfall[i+1] for i = 11.
You should have started at i = 1, and left it as rainfall[i].
Find the lowest PHP array value (specific) and return lowest key

Find the lowest PHP array value (specific) and return lowest key


By : Sameer Bin Aboosali
Date : March 29 2020, 07:55 AM
will be helpful for those in need If there is always a value in saleprice, you can adapt your code using array_column to look at only the saleprice values:
code :
$lowest_index = array_keys(array_column($prices, 'saleprice'), min(array_column($prices, 'saleprice')));
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