Imagine that you have a Google Sheet that you have sorted by a certain column. You might be sorting by the surname of your sales team, class sections or regions. To make the sheet easier to read for your team, you want to alternate the background colours after each category in your sort column is complete.
I have the following list of numbers in column 1 and 2. I have sorted these numbers by my Grouping Column of planets in column 3. After each grouping, I have alternated the background colour to make the transition easier to read.
Quite often I will need to get the range of each category in an item and do something with it in Google Sheets. For example, I work in education, I will often have rows of students that are categorized by class sections. I will then be asked to do something like those sections like put each section of students in their own sheet or set alternating colours for each section to make the sheet easier to read.
Alternatively, you may want to grab sales data by region or sales items by a particular category and work with them in Google Apps Script.
Let’s say we want to get the range values of the following sheet by planets. We will be categorizing our data by the Grouping, column C.
First, we don’t want to take into account the headers on the first row. Our first grouping will be Mars, followed by Jupiter, Uranus, and Mercury. We want to know which column that each category starts on and how many of that category there are.