11 ms·
In that case, you should divide by "expected", so you get a percentage difference for each day. (Normalizing by total for the year doesn't make sense, since ima
by beder 14y ago
In that case, you should divide by "expected", so you get a percentage difference for each day. (Normalizing by total for the year doesn't make sense, since imagine that there were 300 days per month instead of 30 - your numbers would be divided by 10 again, but the data you want to visualize would stay the same.)
- rpicard 14y agoGreat point! Dividing by expected would have been a much nicer solution. I think the method I used still works though, just not as nicely. Am I wrong?
- Kaizyn 14y agoZ-Score is your friend for this kind of data normalization. http://en.wikipedia.org/wiki/Standard_score http://en.wikipedia.org/wiki/Standard_score
- rpicard 14y agoI made an update using standard deviation and Z-score charts instead of my homebrew normalization function (see "Update"): http://robert.io/posts/4.html http://robert.io/posts/4.html