XMM-Newton Science Analysis System
evselect (evselect-3.71.2) [xmmsas_20230412_1735-21.0.0]
The selection expression is input as a string using the parameter
expression, which is set to the value “true” by default.
One can also filter an event list based on the data subspace
information stored in another data block. The name of this block is
specified with the dssblock. Which type of filter is used (expression
or data subspace) is controlled with the filtertype parameter,
with is set to “expression” by default.
For a description of the syntax rules the boolean selection expression
must adhere to, as well as example expressions, please consult the documentation
of the SAS package selectlib.
XMM-Newton SOC -- 2023-04-16
