Stream data files

Each stream (and hence each training or test instance) is stored in an individual file; typically in a data subdirectory. So, for example, the first instance from the Tech Support domain $s_1$, might be stored in the file data/s1.tsd. The suffix ``.tsd'' stands for TClass Stream Data. The contents of data/s1.tsd are shown in Figure 5.10.

Figure 5.10: An example of a TClass Stream Data (tsd) file.

This is not a particularly interesting example. The first few lines of one stream from the sign recognition domain is shown in Figure 5.11. Rather than a single value on each line, there are 8, one corresponding to each channel. This tells us, for instance, that to start with, the x position is -0.023 (i.e. to the right of the body), and by the fifth frame, it has moved closer to the centre of the body (i.e. 0.000).

Figure 5.11: An example of a TClass Stream Data (tsd) file from the sign language domain.