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Hi,<br>
<br>
Using Ncl, you can use gsnXYFillColors together with colors defined
by a quadruplet (RGB+transparency) for creating graphs where an
enveloppe between two curves can be lighlty shaded, and superimposed
on another enveloppe.<br>
<br>
This is e.g. useful when showing time evolution of a climate
variable, and its confidence interval, under two forcing scenarios <br>
<br>
I have not been able to figure out from PyNGL doc how to do that :
If ressource <a moz-do-not-send="true"
href="http://www.pyngl.ucar.edu/Resources/ngl.shtml#nglXYFillColors">nglXYFillColors</a>
allow to fill the area between two curves, it only allows for named
colors or color indices, and not color quadruplet such as with
gsnXYFillColors; and PyNGL explanations about named colors and color
indices make no mention of opacity tuning<br>
<br>
Any help would be welcome<br>
<br>
Regards<br>
<br>
Stéphane Sénési<br>
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