Rows and columns

- [Lecturer] Everything that Tableau does behind the scenes,…depending on whether it's using a green or a blue pill.…Understanding how Tableau builds the visualization…is an important concept to understand.…If we drag a blue pill…onto a row or column,…we get a header.…Let's look at an example of that.…If we take Segment and drag it onto Rows,…Tableau's produced a header for us, and it shows each…of the three discreet values that's in that data.…So, a segment has a customer, a corporate,…and a home office.…It's divided the day job into those three categories.…If we add another discreet value onto the column shell,…such as…Category, we now get a second header.…

So, now we have a cross tab where we have the Category…across the top for our columns,…and now we have Segment on our rows.…Now, if we add a continuous pill to our data,…we can now see the value for each one of our categories…and each one of our segments in our cross tab.…If we were to add…a green pill to a row, we get an axis.…Tableau aggregates the value, and positions the mark…