@erAck Thank you very much. I'm nearly there. I am not quite clear what an 'empty match' is or a 'zero or more' pattern. Fortunately, I want to match one to three digits as many times as possible and then flag for the first or second occurrence. I want to separate a column that contains ranges, 30 - 355, into the lower and upper bounds.
I'd also like to sum the lower bounds without making a whole new column, but I haven't worked out how to do that yet.
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