The data to compile the Official Charts is drawn from a highly complex tracking service representing one of the most sophisticated ongoing market research programmes anywhere in the world.
A pie chart can show collected data in sectors. Each sector can be labelled, or can be colour coded with a key. When drawing a pie chart, a protractor will be used to draw the angles accurately.
So, it is just after midnight on Saturday morning (Monday morning for video) that Kantar receives the first feeds of data from the 8,000 chart-reporting retailers, who together represent an ...