source (track name, virtual track name or id-time table). Can be a vector of track names.
keepref
'TRUE' or 'FALSE'
time.shift
time shift and expansion for iterator time
val
selected values
expiration
expiration period
operator
operator for filtering. Accepts one of: "=", "<", "<=", ">", ">="
Details
Given filter parameters, generate a name with the following format:
"f_(src).kr(keepref).vals_(val).ts_(time.shift).exp_(expiration).op_(operator)"
Where for 'val' and 'time.shift' the values are separated by an
underscore.
If time.shift, val or expiration are
NULL - their section would not appear in the generated name.