Next Big Sound approximates weekly data through a process called interpolation. Interpolation allows us to estimate daily data values from data sources that report once a week. Simply put, we take a weekly data point and distribute it among the seven days that make up that past week. Weekly data point, divided by seven: it’s as easy as that!
Interpolation allows us to display weekly data everywhere on Next Big Sound, side by side with daily data. It allows you to pick whatever date range you’d like to see — the past seven days, the past 149, or even the past three — and still easily evaluate weekly data.
Let’s say that you’re looking at 10 days of data for a weekly data source. If we didn’t interpolate data, you might only capture one weekly data point within the date range you’ve selected, which would under-represent values; you might capture two weekly data points, which would over-represent values. Interpolation fits weekly data into a daily format and gives you a suitable estimate for the date range you’ve selected.
Approximated daily data appears in several places on Next Big Sound: profiles, reports, and graphs receive and display approximated data. You’ll see a “W” next to any approximated figures to let you know that you’re seeing interpolated weekly data.