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This question already has an answer here:

In a bash script I have several arrays which I need to access in a gnuplot code:

#!/bin/bash
...
# fill array a[*] and b[*]
...
gnuplot <<EOF
  do for [j=0:10] { # access ${a[j]} and ${b[j]} }
EOF

The problem is that ${a[j]} in the gnuplot code is not interpreted as element j of the array a.

How can I solve that?

marked as duplicate by Gilles bash May 3 '16 at 23:16

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