Cumulative Average in Excel: Restarting the Average with a Zero Value Based on Sticker Name
In this article, we will discuss how to create a cumulative average in Excel that depends on the sticker name and restarts the average with a zero value when the sticker name changes. This is a useful technique for analyzing data with multiple categories or groups.
Understanding Cumulative Averages
A cumulative average is a type of calculation that sums up all the previous values in a data set and divides it by the number of observations up to that point. In Excel, you can easily calculate a cumulative average using the AVERAGE and LARGE functions. However, when dealing with data that has multiple categories or groups, you may want to restart the cumulative average when the category changes.
Setting Up the Data
To demonstrate this technique, let's assume we have a data set that includes the following columns: "Sticker Name", "Price", and "Quantity". The sticker name represents the category or group, while the price and quantity represent the values we want to analyze.
Sticker Name | Price | Quantity
-------------|-------|----------
Sticker A | 10 | 2
Sticker A | 12 | 3
Sticker A | 15 | 4
Sticker B | 5 | 1
Sticker B | 8 | 2
Sticker B | 12 | 3
Sticker C | 20 | 1
Sticker C | 25 | 2
Sticker C | 30 | 3
Calculating the Cumulative Average with a Restart
To calculate the cumulative average that restarts when the sticker name changes, we can use a combination of the AVERAGE, IF, and ROWS functions. Here's how:
- In a new column, use the following formula to calculate the cumulative average:
=IF(A2=A1, AVERAGE(B2:B$1) * (ROWS(B$2:B2) / ROWS(B$2:B1)), B2)
Where:
A2andA1represent the sticker name in the current and previous rows, respectively.B2:B$1represents the range of price values up to the current row.ROWS(B$2:B2)represents the number of rows in the current price range.ROWS(B$2:B1)represents the number of rows in the previous price range.B2represents the current price value.
- Copy the formula down to the rest of the rows in the column.
The resulting column will show the cumulative average price for each sticker name, restarting the average when the sticker name changes.
In this article, we discussed how to create a cumulative average in Excel that depends on the sticker name and restarts the average with a zero value when the sticker name changes. By using a combination of the AVERAGE, IF, and ROWS functions, you can easily analyze data with multiple categories or groups.