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average if
I'm trying to average the last 30 values in a column.
Column A contains a date and Column B contains a value for that date. A running average of the last 30 days (or 1-month) needs to be kept so that if new data is entered the average automatically updates. any ideas? I was thinking something like =AVERAGEIFS(B:B,A:A,LARGE(A:A,30)) but the greater than seems to muck things yup. thanks |
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