How to Create a hystogram based on a timetable?

Hi, I have a time table that contains data from 28 days from 3 engines.

I have group them and synchronized them but I am having issues to create an histogram showing hours of engine activity per day. Engine activity is showed by engine load. therefore something like if Engine1Load>0, then engine1 is on. This should be done for the 3 engines and duration should be extracted from Absolute time.

Table looks something like this

Absolute Time Engine1Load Engine2Load Engine3Load

2020-02-18 17:58:11 NaN 40 NaN

2020-02-18 17:58:12 NaN 40 45

2020-02-18 17:58:13 NaN 40 45

2020-02-19 19:20:00 NaN 40 45

2020-02-19 19:20:01 15 40 45

2020-02-19 19:20:02 30 40 NaN

and the histogram would be something like this, in this case this is seconds, I want to do it in hours

Any ideas?

Thanks

Answer 1

[Gargi Patil]

You can create stacked graphs using bar graphs. You can refer to the following documentation for implementation details: https://www.mathworks.com/help/matlab/ref/bar.html#bthxce9

You can also refer to a similar question on stacked histograms that has been answered: https://www.mathworks.com/matlabcentral/answers/293124-how-to-stack-hist