The COMPRESS X/COMPRESS Y attributes store data with or without compression. In the default (1) mode, data is stored with compression, and values read by the VALUES or MARKERS attributes may be different than the original values set. In the uncompressed (0) mode, data is stored without compression and values read are the same as values set.
In the "SHARED X" mode, X data is interdependent with other traces. Therefore, "COMPRESS X" must be set after the "SHARED X" attribute is set if you want to store the original X data in "SHARED X" mode. The trace is erased when either "COMPRESS X" or "COMPRESS Y" is changed.
