I want to know how to create(search) stacked bar chart like this.
|<-----PC ON---->|<-----PC Standby------>|<----PC ON--->|<-------- PC shutdown(no log)------>|<-----PC ON---->|
x|-9:00 -------------------------------------------------------------------------------------------------------------------------------------
data format are follows.
ex)
start,end,state,duration
9:00:00,9:30:00,ON,00:30:00
9:30:00,9:45:00.Standby,00:15:00
9:45:00,10:15:00,ON,00:30:00
...
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