frequency chart

[resago]

just an example:

 

I had a 6 meg text file with the following data:

 

Proc Code  ICD9 Code  - each are alpha numeric

 

here's the fun part, there can be multiple proc codes of the same value, but a gamut of icd9 codes.

 

here is an example of using php's flexibility of array indexing.

 

$codes = array("cpt"=>array(),"icd9"=>array());

$handle = @fopen("codes.txt", "r");

if ($handle) {

    while (!feof($handle)) {

        $buffer = rtrim(fgets($handle));

        $token = preg_split('/ +/', $buffer);

        $procs[]= $token[0];

        $codes["cpt"][$token[0]]["icd9"][$token[1]]++;

    }

    fclose($handle);

}

$procs=array_unique($procs);

sort($procs);

 

because php allows you to used undefined array offsets, this works beautifully.

 

then I just run through the array and get all my values and counts.

 

 

foreach ($procs as $cpt){

  $sum = array_sum($codes["cpt"][$cpt]["icd9"]);

  $icd9s = array_keys($codes["cpt"][$cpt]["icd9"]);

  $i=0;

  foreach ($codes["cpt"][$cpt]["icd9"] as $icd9){

    $avg = $icd9 / $sum;

    $table[] = "$cpt,$icd9s[$i],$icd9,$avg\n";

    $i++;

  }

}

 

 

 

[Fyorl]

I think using $array[] is just a shortcut for $array[count($array)]. A lot of languages have variable-length array support. Nice example though.

[resago]

this is actually what I was getting at..

 

$codes["cpt"][$token[0]]["icd9"][$token[1]]++;

 

the indexs being created were the values in the text file.

 

[Barand]

I think using $array[] is just a shortcut for $array[count($array)]. A lot of languages have variable-length array support. Nice example though.

 

$array[] = $something;

 

is a shortcut for

 

array_push($array, $something);

 

IE. add $something as the next element in $array

 

EDIT: Yes, I guess that amounts to $array[count($array)] = $something;

[Fyorl]

Actually I was thinking about it and your way is probably safer. My version would probably only work as expected for enumerated arrays. Even then I'm not sure if unset() resets array keys so you might still end up with gaps.