Done a bit of reading: Normal[Series[ ]] does not give a normal expression
Regarding the Evaluated->True, consider:
Plot[Evaluate[0 + {Sin[x], Cos[x]}], {x, 0, 4 Pi}, Filling -> Axis]
But now let's see what Evaluated->True does.
Plot[0 + {Sin[x], Cos[x]}, {x, 0, 4 Pi}, Filling -> Axis,
Evaluated -> True]
Why the difference?
System`ProtoPlotDump`iPlot) theFillingoption value is processed to generate a full filling description for each plotted curve. This process does not take into account theEvaluatedoption and so sees only a single expression in your second example, and therefore only creates aFillingspecification for one curve. I suggest you submit a bug report to Wolfram. – Simon Woods Nov 22 '14 at 22:57Evaluateddoes not appear to be an option listed in the Documentation Center forPlot, andEvaluateddoes not even appear to have a documentation entry (but it's obviously built-in and recognized). – DumpsterDoofus Nov 22 '14 at 22:58Options[Plot]listing includesEvaluated -> Automatic– Bob Hanlon Nov 23 '14 at 02:48Plot[{Sin[x], Cos[x]}, {x, 0, 4 Pi}, Filling -> Axis, Evaluated -> True]andPlot[{0 + Sin[x], 0 + Cos[x]}, {x, 0, 4 Pi}, Filling -> Axis, Evaluated -> True]work as expected. The problem withEvaluatedappears to be related to the depth of the expression to beEvaluated. – Bob Hanlon Nov 23 '14 at 02:58ProtoPlotDumpsounds like an imprecation to me :) – Dr. belisarius Nov 23 '14 at 04:45