Can't plot line if data is not complete

[gpstrive]

Hi，
I have data statistics which is saved in half an hour，but sometimes the save will fail which result the data is not complete。Then I have this problem as the following image：

[fernandommota]

Hello @gpstrive,

You can show me the table with data? i need understand the format of table data...

[gpstrive]

if data on 2015-01-02 05:00:00(just for example, any hour is ok) is lost , then it just display the data in dot instead of the line.