Unlock the Power of Weighted Averages in Google Sheets with Google Apps Script

Are you tired of manually calculating weighted averages in your Google Sheets documents? Say goodbye to tedious number crunching! In this video, we’ll introduce you to a custom Google Apps Script that simplifies the process and automates the calculation of weighted averages for your data.

Here’s what we’ll cover in this video:

The WEIGHTED_AVERAGE function: Learn how to set up and use this custom function to calculate weighted averages.
Practical examples: We’ll walk you through real-world scenarios, such as calculating the weighted grade for a student’s scores or the weighted average of product sales data.
Error handling: Discover how this script gracefully handles non-numeric values and zero weights, ensuring accurate calculations.

You don’t need to be a coding expert to benefit from this script; we’ll guide you through the setup process step by step. Get ready to save time and streamline your data analysis in Google Sheets.

#GoogleAppsScript #GoogleSheets #WeightedAverages #DataAnalysis #ProductivityTips #Automation #CodingTutorial #YouTubeTutorials #DataScience

function WEIGHTED_AVERAGE(values1,weights1){

const weightedAverage = [];

for(let i=0;i<values1.length;i++){

const val = calWeightAver(values1[i],weights1[i]);

weightedAverage.push([val]);

}

return weightedAverage;

}

function calWeightAver(value,weight){

if(!isNaN(value) && !isNaN(weight) && weight !== 0 ){

return value * weight;

}else{

return 0;

}

WEIGHTED_AVERAGE

In this example, we’ll create a custom formula that calculates the weighted average of a set of values based on their corresponding weights.

Scenario: You want to create a custom formula that calculates the weighted average of a set of values using their corresponding weights.

function WEIGHTED_AVERAGE(values1,weights1){

const weightedAverage = [];

for(let i=0;i<values1.length;i++){

const val = calWeightAver(values1[i],weights1[i]);

weightedAverage.push([val]);

}

return weightedAverage;

}

function calWeightAver(value,weight){

if(!isNaN(value) && !isNaN(weight) && weight !== 0 ){

return value * weight;

}else{

return 0;

}

=WEIGHTED_AVERAGE(A2:A4,B2:B4)

The provided Google Apps Script code defines two functions, WEIGHTED_AVERAGE and calculateWeightedAverage, which work together to calculate the weighted average for a set of values and their corresponding weights. Below is a detailed explanation of how these functions work:

1. calculateWeightedAverage(value, weight) Function:

This is a utility function that calculates the weighted value of a single pair of value and weight. It ensures that both the value and weight are numeric (not NaN), and that the weight is not zero to avoid division by zero errors. The function can be used for individual value-weight pairs. If the provided values or weights don’t meet these criteria, it returns a default value of 0 (or any other specified value) to handle the error.

value: A numeric value.
weight: A numeric weight associated with the value.

2. WEIGHTED_AVERAGE(values1, weights1) Function:

This function calculates the weighted average for a set of values and their corresponding weights. It accepts two arrays as parameters:

values1: An array containing values for which you want to calculate the weighted average.
weights1: An array containing weights corresponding to the values in values1.

Here’s how the WEIGHTED_AVERAGE function works:

It initializes an empty array called weightedAverage1 to store the calculated weighted values for each pair of value and weight.
It uses a for loop to iterate through the values1 array. For each element at index i, it calls the calculateWeightedAverage function, passing the value at the current index and the corresponding weight. The calculated weighted value is then stored in the weightedAverage1 array as an element within its own array.
Finally, it returns the weightedAverage1 array, which contains the calculated weighted values for the set of values in values1 and their corresponding weights in weights1.

In summary, these functions are designed to calculate the weighted average for a set of values and their corresponding weights while ensuring that non-numeric or zero weights do not disrupt the calculation. The calculateWeightedAverage function provides a basic building block for these calculations, and the WEIGHTED_AVERAGE function applies it to an entire array of value-weight pairs.

Value	Weight	Total
99.00	0.50	49.50
70.00	0.30	21.00
95.00	0.30	28.50
264.00		99.00

Step 1: Access Google Sheets

Open a web browser and navigate to Google Sheets at sheets.google.com.
Log in to your Google account or create one if you don’t have an account.

Step 2: Create or Open a Google Sheets Document

Create a new Google Sheets document by clicking the “+ Blank” option or open an existing document where you want to calculate the weighted averages.

Step 3: Open the Script Editor

In the Google Sheets document, click on “Extensions” in the top menu.
Select “Apps Script” from the dropdown menu.

Step 4: Copy and Paste the Script

In the Apps Script editor, you will see a default myFunction() function. You can remove this function if you don’t need it.
Copy the provided script that contains the WEIGHTED_AVERAGE and calWeightAver functions.
Paste the script into the script editor, replacing any existing content.

Step 5: Save the Project

Click the floppy disk icon (or press Ctrl + S or Cmd + S) to save the project.
Provide a name for your project, if prompted, and click “OK.”

Step 6: Close the Script Editor

Close the Apps Script editor tab.

Step 7: Use the WEIGHTED_AVERAGE Function in Google Sheets

In your Google Sheets document, you can use the WEIGHTED_AVERAGE function in a cell to calculate the weighted average for a set of values and their corresponding weights.

For example, if you have values in cells A1:A5 and weights in cells B1:B5, you can use the formula =WEIGHTED_AVERAGE(A1:A5, B1:B5) in another cell to get the weighted average.

Step 8: Test the Function

Enter values and weights in the specified cells.
Place the WEIGHTED_AVERAGE formula in a cell.
The cell with the formula will display the calculated weighted average.

You’ve now successfully set up and used the provided script in Google Sheets to calculate weighted averages. This script will calculate the weighted average for a set of values and their corresponding weights, while handling cases with non-numeric or zero weights gracefully.

WEIGHTED_AVERAGE

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