topic differnce in temperatures - ignore nulls in App Development

differnce in temperatures - ignore nulls

joeybird — Mon, 18 Apr 2016 09:53:31 GMT

Hiya

I need to work out time difference between one date time stamp and another.

temperature of a room is taken on regular intervals during the day. This date time is recorded in the column, DateTimeTaken

=interval(max({<Temperature={'>=35'}>} DateTimeTaken) - min({<Temperature={'<=35'}>}DateTimeTaken) ,'h:mm' )

I need to calculate the time take for the room to reach 35.

sometimes the Temperature column is not filled in ''null'

please help

swuehl — Mon, 18 Apr 2016 09:59:32 GMT

I guess it should be

=interval(Min({<Temperature={'>=35'}>} DateTimeTaken) - Max({<Temperature={'<=35'}>}DateTimeTaken) ,'h:mm' )

Mon, 18 Apr 2016 10:21:00 GMT

U can just use the max DateTimeTaken before it reached 35

=interval(max({<Temperature={'<=35'}>}DateTimeTaken),'h:mm' )

swuehl — Mon, 18 Apr 2016 11:59:21 GMT

Could you maybe post some sample lines of data and your requested result?

joeybird — Mon, 18 Apr 2016 14:55:02 GMT

worked brill thank you x