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Date/hour variable: format just to see the hour and gen line graph

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Hi all,

I have a dataset containing fights in a school. I was asked to do some descriptive analysis, especially graphs, using the date variable to see if perhaps students fight more in a particular day of the week or hour, moth etc.

I have a date variable storage type= double; display format %tc.. ex 11:30:00 11:40:59. I need to format this variable so I can differentiate from 11 am to 11 pm or perhaps 11 and 21 hours. Although I did some quick reading on format function I did not find answer.

Then I need to create a line chart of my hour variable. My tried was histogram IncidentDate, frequenc. But I would like a line graph. I supposed this is pretty easy to do but again I did not find a way to do a line graph for a single variable (frequencies). Please find attach an example of how I would like the graph to look- the variable a I used for this graph is another date variable but it will work for the hour variable as well. .


Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input float id double IncidentTime
 1 -1893406199999.9998
 2      -1.8934368e+12
 3      -1.8934158e+12
 4      -1.8934155e+12
 5 -1893414960000.0002
 6      -1.8934209e+12
 7      -1.8934164e+12
 8      -1.8934074e+12
 9      -1.8934149e+12
10      -1893410580000
11      -1.8934206e+12
12 -1893408899999.9998
13      -1.8934023e+12
14       -1.893381e+12
15      -1.8934362e+12
end
format %tchh:MM:SS IncidentTime
--------------




Thank you very much!
MArvin

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