| sumFlags | R Documentation | 
This function will sum two indicator variables of the type
XYZ where X, Y or Z are 0 or 1, and the result will be itself
a XYZ variable. Note: if new and old are used,
flags should not be used, and vice versa.
sumFlags(new = NA, old = NA, flags = NA)
new | 
 The new flag. Should be a scalar.  | 
old | 
 The old flags. Can be a vector.  | 
flags | 
 A numeric vector of flags to be summed.  | 
An indicator variable.
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