因此this question涉及如何根据数组(或单个列)中的值选择数据帧中行的子集。我不足以解决我的问题。
我在多个目录中有许多不同的表。我有一本字典,其中包含表之间的关系(例如用于联接的键)。对于每个表T1,我查找共享相同列名(键)的其他表(T2,T3 ...),并且要过滤这些表(T2,T3 ...),以在表中包含具有匹配键值的行。 T1列集。按键设置可能有所不同! T1可以在一个列(键)上连接到T2,而T1可以在5个键上与T2连接!我事先不知道这一点。
例如,我有t1, t2, t3
和pks=["id"] (t1-->t2), fks=["id", "index", "zip"] (t1-->t3)
t1
id|index|zip|v
10|10000|200|20
t2
id|v
10|30
20|50
30|70
t3
id|index|zip|v
00|10000|200|10
10|10000|200|20
10|10000|300|30
10|10000|200|10
t2和t3的输出为
t2
id|v
10|30
和 t3
id|index|zip|v
10|10000|200|20
10|10000|200|10
看看前面的答案,我可能需要做类似的事情
filtered_t2 = t2.loc[t2[pks].isin(t1[fks])]
但是我收到以下错误消息
ValueError: Cannot index with multidimensional key
可能以这种方式我无法处理复合键,但是如果我只提供一个键-'id',也会失败。 所以也许它不能接受数组作为值...
当pks
和fks
是可变大小的数组时,如何处理?
这是正确的方法吗?
filter = None
for p, f in zip(pks, fks):
if filter is None:
filter = t2[p].isin(t1[f])
else:
filter &= t2[p].isin(t1[f])
filtered_ft = t2.loc[filter]
谢谢!
答案 0 :(得分:1)
让我们在这里尝试<!--https://google-developers.appspot.com/chart/interactive/docs/gallery/linechart-->
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart1);
function drawChart1() {
var dataTable = new google.visualization.DataTable();
dataTable.addColumn('string', 'Month');
//loop from above for store and store base
<?php echo($cstores); ?>
dataTable.addRows([
<?php
$sql = "SELECT
QUOTE(DATE_FORMAT(date_submitted,'%b-%y')) AS 'Month'
". $string ."
FROM data
WHERE store_list IN (" . $user_stores . ")
GROUP BY YEAR(date_submitted), MONTH(date_submitted)
ORDER BY YEAR(date_submitted) ASC, MONTH(date_submitted) ASC";
$query = mysqli_query($conn,$sql);
foreach( $query as $key => $array ) {
echo("[");
foreach( $array as $attribute => $value ) {
echo str_replace("|","\\n",$value) . ","; //couldn't put \\n in the SQL above as it rendered in the output and broke it, so replacing the | here with \\n so it renders properly in the chart
}
echo("],");
}
?>
]);
var options = {
title: '',
vAxis: {
minValue: 0,
maxValue: 10,
<?php if($submittedValue == 3){ // adjust chart scale and axis if MPO
echo("format: '#\'%\'',");
echo("title: 'Percent',");
}
else{
echo("title: 'Score 0-10'");
}
?>
},
legend: {
position: 'bottom',
},
pointSize: 10,
pointShape: 'diamond'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(dataTable, options);
}
merge
以其他方式
t2.merge(t1,how='inner',on=['id'])
t3.merge(t1,how='inner',on=['id','index','zip'])