Function to recognise if a date is a monday

[TheNameless122]

I have a list of data where the date is in column A and values are in E. I need to take only that numbers that were recorded on a Monday and average them.

Thanks

[romperstomper]

=AVERAGE(IF(WEEKDAY(A2:A20,2)=1,E2:E20))
array entered (using Ctrl+Shift+Enter) and adjust ranges to suit.

[TheNameless122]

Very helpful, Im going to work on this for a while, but im sure I will need more help soon. Thanks.

[TheNameless122]

How could you do...

put contents from cell E2 in current cell if it was recorded on a Monday?

[romperstomper]

=if(weekday(a2,2)=1,e2,"")

[TheNameless122]

=if(weekday(a2,2)=1,e2,"")

Great, last thing... How can you average the contents of a column while excluding the value of zero.

[romperstomper]

Much like the date:
=AVERAGE(IF(E2:E20<>0,E2:E20))
array-entered.