An AF attribute called BPP cumulative will be increasing from value 0 to 2.5 and another analysis of linear regression function should work only after the BPP cumulation crosses 0.5.
The start time in linRegr function will be the time when BPP cumulation attribute crossed value 0.5 first time .
As cumulation still go on increasing to 2.5, how to record the time when it has first crossed the value 0.5 so as to use this as start time of linear regression.
I'm checking like if (BPP Cumulation>0.5) then timestamp(BPP Cumulation) but timestamp gets recorded for all values after 0.5 . I just want that specific timestamp.