About CW5.4 PA_SPA_1

Dear all,

In the section, Choosing a Reference.
I just couldn’t find the traces mentioned in the block-

For example, in the following trace, the black section doesn’t shift in time, making it a poor choice. Meanwhile, the purple section does shift in time, but isn’t unique: it’s very likely that it will match with another part of the trace. The blue selection, however, is both unique and moves in time.

Where are these color sections?


There’s no PA_SPA_1 in CW5.4. Do you mean sca101/Lab 2_1?

Hi Alex,

  I mean the following directory,


Everything in the archive folder is no longer supported. If you’re looking for a similar lab, try courses/sca101/Lab 2_1B...