Hi,
I am looking to convert 15 minute data to 30minute data as below (for 1000s of rows):
<colgroup><col><col span="3"></colgroup><tbody>
1/01/2019 8:15
1801.669
1/01/2019 8:30
3602.79
1/01/2019 8:30
1801.121
1/01/2019 9:00
3606.543
1/01/2019 8:45
1803.261
1/01/2019 9:00
1803.282...