The temperature history is collected from the Electronic Visualization Laboratory (EVL) of University of Illinois at Chicago (UIC). The data contains indoor temperature history form July 28, 2005 to August 24, 2011 with roughly one hour interval. The rooms covered are meeting room, main lab, machine room, lounge, prototype space, classroom and office space.

Original data was in the format of "Jul/28/2005 3:38 PM sensor_id 67". The sensor_id is a 16 character string and the last column is the temperature in Fahrenheit. This data was preprocessed using a C program in a format so that first column contains the time altogether. Hours are converted to 24hr format and the above time looked like 20050728/1538. The temperature of different sensors (hence rooms) for the same time (as in first column of a row) is stored in their respective columns in the same row. This is done for loading and sorting related data faster.

However, some sensor data were not found for a given time (when other sensors had data). These missing cells of the data table are filled with the absolute zero value, i.e. -459.

To compare with outdoor temperature, history of Chicago temperature was required. That has been collected from National Data Buoy Center. This data is converted to a similar table, but not in the same table since reading times are different.