Two functions and one problem

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  • Nico
    #1

    Two functions and one problem


    Hi,

    I've created the following sample php code.

    Elements<br>
    <?php
    $elements[1]="element1";
    $elements[2]="element2";
    $elements[3]="element3";
    $elements[4]="element4";
    $elements[5]="element5";
    ?>
    Combinations
    <?php
    $combinations[1][1]="element1"; // Combination of element 1 with element
    2
    $combinations[1][2]="element2";
    $combinations[2][1]="element3"; // Combination of element 1 with element
    3
    $combinations[2][2]="element1";
    $combinations[3][1]="element4"; // Combination of element 1 with element
    4
    $combinations[3][2]="element1";
    $combinations[4][1]="element5"; // Combination of element 1 with element
    5
    $combinations[4][2]="element1";
    ?>

    I'd like to define two simple functions:
    countcombinatio ns(a,...;b,...)
    listcombination s(a,...;b,...)

    The first function "countcombinati ons(a,...;b,... )" should count how many
    combinations exist in which "a" and "..." are included and "b" and "..."
    are not included.

    Example
    countcombinatio ns(element1;ele ment2,element3)
    Result: 2 ("element1 combined with element4" and "element1 combined with
    element5")

    The second function "listcombinatio ns(a,...;b,...) " should list the elements
    combined with "a" and "...", excluding from the list the elements "b" and
    "...".

    Example
    listcombination s(element1;elem ent2,element3)
    Result: element4, element5

    I've some difficult in defining this two functions.
    Can you help me please?
    Many thanks.

    Best,
    Nico
    Tags: None
    • Sheldon Glickler
      #2
      Re: Two functions and one problem


      "Nico" <nico@nospam.it wrote in message news:44bcabd9$1 @news.unimib.it ...
      >
      Hi,
      >
      I've created the following sample php code.
      >
      Elements<br>
      <?php
      $elements[1]="element1";
      $elements[2]="element2";
      $elements[3]="element3";
      $elements[4]="element4";
      $elements[5]="element5";
      ?>
      Combinations
      <?php
      $combinations[1][1]="element1"; // Combination of element 1 with element
      2
      $combinations[1][2]="element2";
      $combinations[2][1]="element3"; // Combination of element 1 with element
      3
      $combinations[2][2]="element1";
      $combinations[3][1]="element4"; // Combination of element 1 with element
      4
      $combinations[3][2]="element1";
      $combinations[4][1]="element5"; // Combination of element 1 with element
      5
      $combinations[4][2]="element1";
      ?>
      >
      I'd like to define two simple functions:
      countcombinatio ns(a,...;b,...)
      listcombination s(a,...;b,...)
      >
      The first function "countcombinati ons(a,...;b,... )" should count how many
      combinations exist in which "a" and "..." are included and "b" and "..."
      are not included.
      >
      Example
      countcombinatio ns(element1;ele ment2,element3)
      Result: 2 ("element1 combined with element4" and "element1 combined with
      element5")
      >
      The second function "listcombinatio ns(a,...;b,...) " should list the
      elements
      combined with "a" and "...", excluding from the list the elements "b" and
      "...".
      >
      Example
      listcombination s(element1;elem ent2,element3)
      Result: element4, element5
      >
      I've some difficult in defining this two functions.
      Can you help me please?
      Many thanks.
      >
      Best,
      Nico
      I don't know if these ae related to your problem, but:
      1 - indices start with zero, not one.
      2 - A semicolon ends a sentence so I don't understand your argument list
      3 - I cannot follow your naming in "combinatio ns".

      Is this a school project?

      Shelly


        Comment

        • Nic
          #3
          Re: Two functions and one problem

          Thanks for the answer.
          No. This is not a school project. Just a funny hobby.

          Nico

          "Sheldon Glickler" <sheldonlg@as ap-consult.comha scritto nel messaggio
          news:Lv2vg.93$1 Z5.65@twister.n yroc.rr.com...
          >
          "Nico" <nico@nospam.it wrote in message news:44bcabd9$1 @news.unimib.it ...
          >>
          >Hi,
          >>
          >I've created the following sample php code.
          >>
          >Elements<br>
          ><?php
          >$elements[1]="element1";
          >$elements[2]="element2";
          >$elements[3]="element3";
          >$elements[4]="element4";
          >$elements[5]="element5";
          >?>
          >Combinations
          ><?php
          >$combination s[1][1]="element1"; // Combination of element 1 with element
          >2
          >$combination s[1][2]="element2";
          >$combination s[2][1]="element3"; // Combination of element 1 with element
          >3
          >$combination s[2][2]="element1";
          >$combination s[3][1]="element4"; // Combination of element 1 with element
          >4
          >$combination s[3][2]="element1";
          >$combination s[4][1]="element5"; // Combination of element 1 with element
          >5
          >$combination s[4][2]="element1";
          >?>
          >>
          >I'd like to define two simple functions:
          >countcombinati ons(a,...;b,... )
          >listcombinatio ns(a,...;b,...)
          >>
          >The first function "countcombinati ons(a,...;b,... )" should count how many
          >combinations exist in which "a" and "..." are included and "b" and "..."
          >are not included.
          >>
          >Example
          >countcombinati ons(element1;el ement2,element3 )
          >Result: 2 ("element1 combined with element4" and "element1 combined with
          >element5")
          >>
          >The second function "listcombinatio ns(a,...;b,...) " should list the
          >elements
          >combined with "a" and "...", excluding from the list the elements "b" and
          >"...".
          >>
          >Example
          >listcombinatio ns(element1;ele ment2,element3)
          >Result: element4, element5
          >>
          >I've some difficult in defining this two functions.
          >Can you help me please?
          >Many thanks.
          >>
          >Best,
          >Nico
          >
          I don't know if these ae related to your problem, but:
          1 - indices start with zero, not one.
          2 - A semicolon ends a sentence so I don't understand your argument list
          3 - I cannot follow your naming in "combinatio ns".
          >
          Is this a school project?
          >
          Shelly
          >

            Comment

            • ImOk
              #4
              Re: Two functions and one problem

              Nico,

              This is not a PHP problem. I would pose this question in one of the
              math or statistical groups.

              Once you get the pseudo code in place it should be easy to program it
              in PHP.

              Nico wrote:
              Hi,
              >
              I've created the following sample php code.
              >
              Elements<br>
              <?php
              $elements[1]="element1";
              $elements[2]="element2";
              $elements[3]="element3";
              $elements[4]="element4";
              $elements[5]="element5";
              ?>
              Combinations
              <?php
              $combinations[1][1]="element1"; // Combination of element 1 with element
              2
              $combinations[1][2]="element2";
              $combinations[2][1]="element3"; // Combination of element 1 with element
              3
              $combinations[2][2]="element1";
              $combinations[3][1]="element4"; // Combination of element 1 with element
              4
              $combinations[3][2]="element1";
              $combinations[4][1]="element5"; // Combination of element 1 with element
              5
              $combinations[4][2]="element1";
              ?>
              >
              I'd like to define two simple functions:
              countcombinatio ns(a,...;b,...)
              listcombination s(a,...;b,...)
              >
              The first function "countcombinati ons(a,...;b,... )" should count how many
              combinations exist in which "a" and "..." are included and "b" and "..."
              are not included.
              >
              Example
              countcombinatio ns(element1;ele ment2,element3)
              Result: 2 ("element1 combined with element4" and "element1 combined with
              element5")
              >
              The second function "listcombinatio ns(a,...;b,...) " should list the elements
              combined with "a" and "...", excluding from the list the elements "b" and
              "...".
              >
              Example
              listcombination s(element1;elem ent2,element3)
              Result: element4, element5
              >
              I've some difficult in defining this two functions.
              Can you help me please?
              Many thanks.
              >
              Best,
              Nico

                Comment

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