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指定数值的图例

指定数值的图例

Wolfram Language code: data = {0.3, 0.3, 1.2, 0.8, 3.1, 1, 4, 0.1};
修改数据，为大于平均值的数据元素添加一个独有的颜色和图例：
Wolfram Language code: newdata = MapIndexed[If[# > Mean[data], Style[ Legended[#, Row[{"bar", First[#2]}]], ColorData[63, First[#2]]], #]&, data];
为大于平均值的数据元素创建图表图例：
Wolfram Language code: styles = Sequence@@{ImageSize -> 400, ChartStyle -> Gray, GridLinesStyle -> Directive[AbsoluteThickness[3], LightGray]};
Wolfram Language code: BarChart[newdata, ChartElementFunction -> "FadingRectangle", GridLines -> {None, {Mean[data]}}, Evaluate@styles, ChartLegends -> SwatchLegend[None, LegendMarkerSize -> 20, LegendMarkers -> "FadingRectangle", LabelStyle -> {Gray, Bold, 18}, LegendLabel -> "above mean"]]