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Filledcurves and color gradient

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Hello,

Is it possible to have a color gradient between filledcurves ?
In the followinf exeample, I would like to have a gradient from green to red starting at the central green line and stoping at the upper red line ; and the same starting from the green line and stopping at the lower red line. That instead of the unique cyan color.

See image : https://www.dropbox.com/s/vragkqu8yhhokdb/gradient.png

$data1 << EOD
1   "1" 3.12    9.47    22.17
2   "2" 5.52    13.19   29.7
3   "3" 2.79    10.6    25.82
4   "4" 2.29    6.44    15.85
5   "5" 2.04    4.14    9.7
6   "8" 1.53    3.2 8.67
7   "12"    0.87    2.26    8.89
EOD
plot "$data1" using 1:3:5 with filledcurves fc rgb 'cyan' title 'Normal values', \
      '' using 1:4 with lines lw 2 lc rgb 'green' title 'Mean', \
      '' using 1:3 with lines lw 2 lc rgb 'red' title 'Low', \
      '' using 1:5 with lines lw 2 lc rgb 'red' title 'High'

I would be gratefull if someone could help as I am not a gnuplot specialist.

Regards,

Alain

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Filledcurves and color gradient al1.reymond@gmail.com - 2017-11-08 23:47 -0800

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