• 合并二维数组,并计算重复字段的平均值


     1 <?php
     2 $arrs = Array ( 
     3     Array ( 'rname' => '小麦', 'm1'=> 12.00 ,'m2'=> 33,'qq'=> 33  ) ,
     4     Array ( 'rname' => '小麦', 'm1' => 23.00,'m2'=> 44,'qq'=> 11 ) ,
     5     Array ( 'rname' => 'ccc', 'm1' => 11,'m2'=> 22,'qq'=> 12 ) 
     6 );
     7 
     8 //计算出重复字段出现的次数
     9 $b=array();
    10 foreach($arrs as $v){
    11     $b[]=$v['rname'];
    12 }
    13 $c=array_unique($b);
    14 foreach($c as $v){
    15     $n=0;
    16     foreach($arrs as $t){
    17         if($v==$t['rname'])
    18             $n++;
    19     }
    20     $d[]['nn']=$n;
    21     
    22 }
    23 
    24 //合并数组中重复的值,并进行加计算
    25 $tmpval=array();
    26 $data=array();
    27 $i=0;
    28 //遍历原数据
    29 foreach($arrs as $key=>$arr){
    30     
    31     if(!empty($tmpval) && array_key_exists($arr['rname'],$tmpval)){
    32         //存在
    33         $key=$tmpval[$arr['rname']];
    34        
    35         $data[$key]['m1']+=$arr['m1'];
    36         
    37         $data[$key]['m2']+=$arr['m2'];        
    38     }else{
    39         //不存在
    40         $tmpval[$arr['rname']]=$i;
    41         $data[$i++]=$arr;
    42     }
    43 }
    44 
    45 //把2个二维数组合并成一个二维数组
    46 $zuizhong = array();
    47 foreach($data as $k=>$r){
    48     $zuizhong[] = array_merge($r,$d[$k]);
    49 }
    50 
    51 //计算出平均值
    52 $datas = array();
    53 foreach($zuizhong as $key=>$arr){    
    54     $datas[$key]['rname'] = $arr['rname'];
    55     $datas[$key]['m1'] = $arr['m1']/$arr['nn'];    
    56     $datas[$key]['m2'] = $arr['m2']/$arr['nn'];
    57 } 
    58 
    59 echo "<pre>";
    60 print_r($d);
    61 print_r($data); 
    62 print_r($zuizhong); 
    63 print_r($datas); 

    http://www.cnblogs.com/losesea/archive/2013/06/14/3134900.html

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  • 原文地址:https://www.cnblogs.com/liruning/p/6112882.html
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