time slot

[GeosoftRim]

Hello ,
I want to define hourly time slots (midnight to 1 a.m., 1 to 2 a.m., ... 3 p.m. to 4 p.m. and so on) to follow the activity throughout the day and identify the period of the day when it there is no more charge.
Can you help me ?
thanks in advance

[Or]

Dayname(YourField) + Hour(YourField)/24

If you want them as a string rather than a timestamp, replace the + with an & and remove the /24.

[GeosoftRim]

thank you for your answer 

here is what it gives in abscissa
The distribution of the activity is good but just the abscissa display which is erroneous

[Or]

I don't know what abscissa is.

You need to format this expression to match the format you want, e.g.

Timestamp(Dayname(YourField) + (Hour(YourField)/24),'DD-MM-YYYY hh)

[GeosoftRim]

the abscissa is the Horizontal coordinate