我想用谷歌柱形图可视化我的数据。但是我无法从MySql获得适当的数据结构。
我当前的查询结果为:
array(6){
[0]=> array(3){["id"]=>"1" ["count"]=>"6" ["day"]=>"15-01-01"}
[1]=> array(3){["id"]=>"2" ["count"]=>"3" ["day"]=>"15-01-01" }
[2]=> array(3){["id"]=>"3" ["count"]=>"1" ["day"]=>"15-01-01" }
[3]=> array(3){["id"]=>"1" ["count"]=>"6" ["day"]=>"15-01-02" }
[4]=> array(3){["id"]=>"2" ["count"]=>"4" ["day"]=>"15-01-02" }
[5]=> array(3){["id"]=>"3" ["count"]=>"6" ["day"]=>"15-01-02" }
}
虽然谷歌图表需要以下格式:
var data = google.visualization.arrayToDataTable([
['Date', '15-01-01', '15-01-02', { role: 'annotation' } ],
['1', 6, 6,],
['2', 3, 4,],
['3', 1, 6,],
]);
如何将数据转换为适当的格式?
更新
我试过这个:
$dateArray= array();
$output= "var data = google.visualization.arrayToDataTable([";
$output .= "['Date',";
foreach($mySqlResult as $val) {
if ( in_array($val['day'], $dateArray) ) {
continue;
}
$dateArray[] = $val['day'];
$output .= "'".$val['day']."',";
}
$output .= " { role: 'annotation' } ],";
foreach($mySqlResult as $val) {
$output .= "['".$val['id']."',".$val['count']."],";
}
$output .= "]);";
这给了我以下结果:
"var data = google.visualization.arrayToDataTable(
[['Date','15-01-01','15-01-02', { role: 'annotation' } ],
['1',6,],['2',3,],['3',1,],['1',6,],['2',4,],['3',6,],]);"
仍然不是需要的。如何为每个具有所有计数的 id 创建行:
['1', 6, 6,],['2', 3, 4,],['3', 1, 6,],
试试这个,它可能会对你有所帮助。我已经在 php 中格式化了数组以获得演示脚本的所需输出。您只需要正确使用循环即可。
<?php
$data = array(
0=> array("id"=>"1","count"=>"6","day"=>"15-01-01"),
1=> array("id"=>"2","count"=>"3","day"=>"15-01-01"),
2=> array("id"=>"3","count"=>"1","day"=>"15-01-01"),
3=> array("id"=>"1","count"=>"6","day"=>"15-01-02"),
4=> array("id"=>"2","count"=>"4","day"=>"15-01-02"),
5=> array("id"=>"3","count"=>"6","day"=>"15-01-02"),
);
$output= "var data = google.visualization.arrayToDataTable([";
$output .= "['Date',";
foreach($data as $val) {
$output .= "'".$val['day']."',";
}
$output .= " { role: 'annotation' } ],";
foreach($data as $val) {
$output .= "['".$val['id']."',".$val['count'].",6,''],";
}
$output .= "]);";
echo $output;
?>