Creating a python formula that subtracts from each array
I have created the following in excel that I am trying to replicate.
Column A show the date
Column B has a binary indicator that can take the value 1 or 0
Column H is the running total of Column B
Now the tricky part:
Column C returns the date of when the cumulative total of the indicator is 1 (value of C2), for the start date corresponding to that row.
e.g. In cell C3, the corresponding start date is 01-Jan and for that date the indicator is 1, so it returns 01-Jan.
However for cell C5, we are looking at 03-Jan onwards, and the first date the total of the indicator reaches 1 is 09-Jan, and this value is returned.
Column D returns the date of when the cumulative total of the indicator is 2 (value of D2), for the start date corresponding to that row.
e.g. In cell D3, the corresponding start date is 01-Jan and when we start on that date, the cumulative total of the indicator reaches 2 on 09-Jan.
In cell C24, we are looking at 22 January onwards, and the first date the total of the indicator reaches 2 is 24-Jan.
The same goes for columns E, F, and G.
![Image of my spreadsheet[1]](https://i.stack.imgur.com/eYa0j.png)
python-3.x
edited Nov 23 '18 at 12:11
Jan Černý
8121622
asked Nov 23 '18 at 10:30
Nin
61
add a comment |
I have created the following in excel that I am trying to replicate.
Column A show the date
Column B has a binary indicator that can take the value 1 or 0
Column H is the running total of Column B
Now the tricky part:
Column C returns the date of when the cumulative total of the indicator is 1 (value of C2), for the start date corresponding to that row.
e.g. In cell C3, the corresponding start date is 01-Jan and for that date the indicator is 1, so it returns 01-Jan.
However for cell C5, we are looking at 03-Jan onwards, and the first date the total of the indicator reaches 1 is 09-Jan, and this value is returned.
Column D returns the date of when the cumulative total of the indicator is 2 (value of D2), for the start date corresponding to that row.
e.g. In cell D3, the corresponding start date is 01-Jan and when we start on that date, the cumulative total of the indicator reaches 2 on 09-Jan.
In cell C24, we are looking at 22 January onwards, and the first date the total of the indicator reaches 2 is 24-Jan.
The same goes for columns E, F, and G.
python-3.x
edited Nov 23 '18 at 12:11
Jan Černý
8121622
asked Nov 23 '18 at 10:30
Nin
61
Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56
add a comment |
I have created the following in excel that I am trying to replicate.
Column A show the date
Column B has a binary indicator that can take the value 1 or 0
Column H is the running total of Column B
Now the tricky part:
Column C returns the date of when the cumulative total of the indicator is 1 (value of C2), for the start date corresponding to that row.
e.g. In cell C3, the corresponding start date is 01-Jan and for that date the indicator is 1, so it returns 01-Jan.
However for cell C5, we are looking at 03-Jan onwards, and the first date the total of the indicator reaches 1 is 09-Jan, and this value is returned.
Column D returns the date of when the cumulative total of the indicator is 2 (value of D2), for the start date corresponding to that row.
e.g. In cell D3, the corresponding start date is 01-Jan and when we start on that date, the cumulative total of the indicator reaches 2 on 09-Jan.
In cell C24, we are looking at 22 January onwards, and the first date the total of the indicator reaches 2 is 24-Jan.
The same goes for columns E, F, and G.
python-3.x
edited Nov 23 '18 at 12:11
Jan Černý
8121622
asked Nov 23 '18 at 10:30
Nin
61
I have created the following in excel that I am trying to replicate.
Column A show the date
Column B has a binary indicator that can take the value 1 or 0
Column H is the running total of Column B
Now the tricky part:
Column C returns the date of when the cumulative total of the indicator is 1 (value of C2), for the start date corresponding to that row.
e.g. In cell C3, the corresponding start date is 01-Jan and for that date the indicator is 1, so it returns 01-Jan.
However for cell C5, we are looking at 03-Jan onwards, and the first date the total of the indicator reaches 1 is 09-Jan, and this value is returned.
Column D returns the date of when the cumulative total of the indicator is 2 (value of D2), for the start date corresponding to that row.
e.g. In cell D3, the corresponding start date is 01-Jan and when we start on that date, the cumulative total of the indicator reaches 2 on 09-Jan.
In cell C24, we are looking at 22 January onwards, and the first date the total of the indicator reaches 2 is 24-Jan.
The same goes for columns E, F, and G.
python-3.x
python-3.x
edited Nov 23 '18 at 12:11
Jan Černý
8121622
asked Nov 23 '18 at 10:30
Nin
61
edited Nov 23 '18 at 12:11
Jan Černý
8121622
asked Nov 23 '18 at 10:30
Nin
61
edited Nov 23 '18 at 12:11
Jan Černý
8121622
edited Nov 23 '18 at 12:11
Jan Černý
8121622
edited Nov 23 '18 at 12:11
Jan Černý
8121622
8121622
asked Nov 23 '18 at 10:30
Nin
61
asked Nov 23 '18 at 10:30
Nin
61
asked Nov 23 '18 at 10:30
Nin
61
61
Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56
add a comment |
Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56
Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56
add a comment |
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Did you try something? If not, please try some code and if you face any errors/issues then post it here in SO.
– Thangadurai
Nov 23 '18 at 10:52
I can do it using for loops but that it is taking quite a while. In terms of other code, I am not sure where to start. With excel, for each row, I am subtracting the cumulative total of the previous row to form a new array in the ($H$3:$H$25)-$H4 for example, I am not sure how to do that here.
– Nin
Nov 23 '18 at 10:56