>> + EXTRACOLS="first_quartile median third_quartile$PERCCOL" > > > This should be > > EXTRACOLS="first_quartile median third_quartile $PERCCOL"
No, because $PERCCOL is built from iteration, so it contains an extra
space from the first loop.
Eventually it could be:
EXTRACOLS="first_quartile median third_quartile ${PERCCOL:1}"
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