Re: Adding coloured Polygon to a BarChart
- To: mathgroup at smc.vnet.net
- Subject: [mg83996] Re: Adding coloured Polygon to a BarChart
- From: "David Park" <djmpark at comcast.net>
- Date: Thu, 6 Dec 2007 02:48:34 -0500 (EST)
- References: <fj65e2$fnd$1@smc.vnet.net>
Your only problem was that you put an extra level of Graphics in the Epilog
list. The following works:
BarChart[{1, 2, 3},
Epilog -> {Style[Text["First", {1, 2}, {0, -1}], 12, Red,
Bold], {Red,
Polygon[{{1.25, 2}, {1.5, 2}, {1.5, 2.25}, {1.25, 2.25}}]}}]
But Epilog is a little inconvenient. If you want to add many things Epilog
becomes the tail that wags the dog. And suppose you wanted to add a curve to
the plot? With the Presentations package all elements are combined in one
drawing statement. Here is a bar chart with a curve and your extra label and
polygon.
Needs["Presentations`Master`"]
Draw2D[
{BarChart[{1, 4, 9}] // DrawGraphics,
Style[Text["First", {1, 2}, {0, -1}], 12, Red, Bold],
Red,
Polygon[{{1.25, 2}, {1.5, 2}, {1.5, 2.25}, {1.25, 2.25}}],
Draw[x^2, {x, 0, 3.2}]},
AspectRatio -> 1,
Axes -> True, AxesOrigin -> {0, 0},
Ticks -> {CustomTicks[Identity, {1, 3, 1, 1}], Automatic}]
--
David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/
<tomfabtastic at hotmail.com> wrote in message
news:fj65e2$fnd$1 at smc.vnet.net...
> Hi,
>
> The below chart successfully uses Epilog to include some text on the
> BarChart:
>
> Needs["BarCharts`"]
> barShape1 =
> BarChart[{1, 2, 3},
> Epilog -> {Style[Text["First", {1, 2}, {0, -1}], 12, Red, Bold]}]
>
> However, I want to add a small Polygon to the graph. Again this works
> well as long as the Polygon is black:
>
> barShape2 =
> BarChart[{1, 2, 3},
> Epilog -> {Style[Text["First", {1, 2}, {0, -1}], 12, Red, Bold],
> Polygon[{{1.25, 2}, {1.5, 2}, {1.5, 2.25}, {1.25, 2.25}}]}]
>
> But I would like to make the Polygon a red colour. But the below does
> not work :
>
> barShape3 =
> BarChart[{1, 2, 3},
> Epilog -> {Style[Text["First", {1, 2}, {0, -1}], 12, Red, Bold],
> Graphics[{Red,
> Polygon[{{1.25, 2}, {1.5, 2}, {1.5, 2.25}, {1.25, 2.25}}]}]}]
>
> Does anyone have a suggestion for adding a coloured Polygon to a
> BarChart ?
>
> Regards,
> Tom
>