te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - How to display percentage to the d3.js piechart - Stack Overflow

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    javascript - How to display percentage to the d3.js piechart - Stack Overflow

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    I have summed up the dataset using nest,rollup and d3.sum functions and I'm able to display the pie chart properly.But I'm unable display percentage for each slice based on the summed total.Can anyone please give suggestions on this issue...

     Mycode:
 ======
   d3.csv("pi.csv", function(error, csv_data) {
         var data = d3.nest()
          .key(function(d) { return d.ip;})
          .rollup(function(d) {
           return d3.sum(d, function(g) {return g.value; });
          }).entries(csv_data);

        data.forEach(function(d) {
         d.ip= d.key;
         d.value = d.values;
        });

        My dataset:
        =========
        ip,timestamp,value
        92.239.29.77,1412132430000,3190
        92.239.29.77,1412142430000,319011
        92.239.29.78,1412128830000,545568
        92.239.29.78,1412130600000,616409
        92.239.29.78,1412132430000,319087
        92.239.29.76,1412130600000,616409
        92.239.29.76,1412132430000,319087

    Thanks in advance

    I have summed up the dataset using nest,rollup and d3.sum functions and I'm able to display the pie chart properly.But I'm unable display percentage for each slice based on the summed total.Can anyone please give suggestions on this issue...

     Mycode:
 ======
   d3.csv("pi.csv", function(error, csv_data) {
         var data = d3.nest()
          .key(function(d) { return d.ip;})
          .rollup(function(d) {
           return d3.sum(d, function(g) {return g.value; });
          }).entries(csv_data);

        data.forEach(function(d) {
         d.ip= d.key;
         d.value = d.values;
        });

        My dataset:
        =========
        ip,timestamp,value
        92.239.29.77,1412132430000,3190
        92.239.29.77,1412142430000,319011
        92.239.29.78,1412128830000,545568
        92.239.29.78,1412130600000,616409
        92.239.29.78,1412132430000,319087
        92.239.29.76,1412130600000,616409
        92.239.29.76,1412132430000,319087

    Thanks in advance

    • javascript
    • csv
    • d3.js
    Share Improve this question edited Jan 4, 2015 at 6:22 asked Jan 4, 2015 at 6:16 user4268849user4268849
    Add a ment  | 

    1 Answer 1

    Reset to default 16

    So it seems that you want to display the percentage of each pie slice on the chart. All you really need to do is to calculate the the total of the values and iterate across the data variable adding in the percentage.

    The data.forEach function doesn't add anything to the data variable, so I would drop that. I should also point out that the d3.nest function rolls up and sums each individual ip entry, so you're not getting sum of all values. However, this is pretty easy to do with d3, you can just use d3.sum:

    var tots = d3.sum(data, function(d) { 
            return d.values; 
        });

    Once you've done that you iterate across the data variable like:

    data.forEach(function(d) {
    d.percentage = d.values  / tots;
});

    You can then access the percentage on each pie slice using something like d.data.percentage

    And putting it all together.

    Note you could also pute the percentage from the start and end angles for each slice: (d.endAngle - d.startAngle)/(2*Math.PI)*100.

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