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I need to determine the Start and End (i.e. first/earliest) coordinates based on a timestamped trip data.
My table is as follows:
trip_id | timestamp | latitude | longitude |
1 | .... 06:00 AM | ....1000 | ....500 |
1 | .... 06:01 AM | ....1001 | ....499 |
1 | .... 06:02 AM | ....1001 | ....498 |
2 | .... 07:30 AM | ....1001 | ....399 |
2 | .... 07:31 AM | ....1002 | ....399 |
2 | .... 07:32 AM | ....1002 | ....398 |
The starting location is therefore:
trip_id | timestamp | latitude | longitude |
1 | .... 06:00 AM | ....1000 | ....500 |
2 | .... 07:30 AM | ....1001 | ....399 |
I need a similar result for the end location. I can then plot the latitude & longitudes on a Map widget.
Solved! Go to Solution.
For anyone else visiting this thread; My solution ended up looking like this:
I create 2 x measures,
Earliest date =
CALCULATE(MIN('Table'[date]),ALLEXCEPT('Table','Table'[trip_id]))
Another for Latest date of a trip_id (i.e. end of trip):
Latest date =
CALCULATE(MAX('Table'[date]),ALLEXCEPT('Table','Table'[trip_id]))
Lastly, I believe I inserted a custom DAX column. This checks whether [date] is:
date_check = IF('Table'[date] = [Latest date], "End Trip", IF('Table'[date] = [Earliest date], "Start Trip", "Waypoint"))
These steps could probably be contained in one DAX expression - but I would rather keep it separated so I can use the measures for other things.
Cheers
@Anonymous , I given the name what there in the sample. Please select the correct column name in your power bi file. Or share a sample pbix
Hi
I did substitute my own parameters into the measure.
Are you able to clarify your original solution more? The instruction is somewhat unclear.
Thank you
For anyone else visiting this thread; My solution ended up looking like this:
I create 2 x measures,
Earliest date =
CALCULATE(MIN('Table'[date]),ALLEXCEPT('Table','Table'[trip_id]))
Another for Latest date of a trip_id (i.e. end of trip):
Latest date =
CALCULATE(MAX('Table'[date]),ALLEXCEPT('Table','Table'[trip_id]))
Lastly, I believe I inserted a custom DAX column. This checks whether [date] is:
date_check = IF('Table'[date] = [Latest date], "End Trip", IF('Table'[date] = [Earliest date], "Start Trip", "Waypoint"))
These steps could probably be contained in one DAX expression - but I would rather keep it separated so I can use the measures for other things.
Cheers
@Anonymous , add a measure like this and all other un summarized column
calculate(min(Table[timestamp]), filter(Table, Table[timestamp] = calculate(min(Table[timestamp]), allexcept(Table, Table[trip_id]))))
Or create measure for all other columns then trip_id
Hi @amitchandak
I'm getting the error:
A single value for column 'timestamp' in table 'Table' cannot be determined. This can happen when a measure formula refers to a column that contains many values without specifying an aggregation such as min, max, count, or sum to get a single results.
Regards
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