Calculate difference in days between two dates with conditions

Question

I need help calculating the difference in two dates if certain criterias are met.

When One is 1 calculate the difference between the date of that value with the date when Move is 1 for each unique values of Person . When the difference in days are calculated, check for the next 1 in One , and so on. When One and Move have 1 in the same row, the value should be 0 (as seen in 14.01.2018). Notice the value in 05.01.2018, value 3 takes the date from 03.01.2018 (not 02.01.2018), as it is the last one if there are leading 1 's.

The expected values are in Days in bold and red:

I have been trying to do this for days in Python programming software, but without success. Any help is appreciated.

Answer 1

Assuming that your description regarding the date in 05.01.2018 is correct, and your screenshot is incorrect, then try:

E2: =IF(AND($C2=1,$D2=1),0,IF($C2=1,$A2-AGGREGATE(14,6,1/(($D$1:$D2=1)*($B$1:$B2=$B2))*$A$1:$A2,1),0))

and fill down.

Use conditional formatting to set the values > 0 to bold/red.