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Re: Creating a Scatter Plot with Labeled Points

  • To: mathgroup at smc.vnet.net
  • Subject: [mg127183] Re: Creating a Scatter Plot with Labeled Points
  • From: Tomas Garza <tgarza10 at msn.com>
  • Date: Thu, 5 Jul 2012 06:15:22 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201207040729.DAA01346@smc.vnet.net>

Forget about Do's and For's. Try this:
S11Exercise64b={{0,120},{10,119},{20,118},{30,117},{40,116},{50,115},{60,114},{70,113},{80,112}};
ListPlot[S11Exercise64b,AxesLabel->{x,y},AxesOrigin->{0,0},Epilog->{Blue,PointSize[.01],Point[S11Exercise64b],Style[Text[ToString[#],#,{0,2}],8,"Label"]&/@S11Exercise64b},PlotRange->{{-5,85},{-5,125}}]
But I'd rather use Tooltip which will show the coordinates of the points when you place the cursor over each of them.
S11Exercise64b = {{0, 120}, {10, 119}, {20, 118}, {30, 117}, {40, 116}, {50,

   115}, {60, 114}, {70, 113}, {80, 112}};
ListPlot[Tooltip[S11Exercise64b],

 AxesLabel -> {x, y}, AxesOrigin -> {0, 0},

 Epilog -> {Blue, PointSize[.01], Point[S11Exercise64b]},

 PlotRange -> {{-5, 85}, {-5, 125}}]
In this way you obtain a less cluttered graph.
-Tomas
> Date: Wed, 4 Jul 2012 03:29:28 -0400
> From: sandwaterhand at gmail.com
> Subject: Creating a Scatter Plot with Labeled Points
> To: mathgroup at smc.vnet.net
>
>
> Hello there.  I'm trying to graph a Scatter Plot based on a given list of
> data and have the coordinates appear near the point.
>
> I'm trying to save time and, instead of manually typing the text for the
> coordinates, I'd like to be able to pull the coordinates from the list to
> plot them point and list the text.  Here's what I have so far:
>
> S11Exercise64b = {{0, 120}, {10, 119}, {20, 118}, {30, 117}, {40, 116},
> {50, 115}, {60, 114}, {70, 113}, {80, 112}};
> ListPlot[S11Exercise64b, AxesLabel -> {x, y}, AxesOrigin -> {0, 0},
>  Epilog -> {Blue, PointSize[.02], Point[S11Exercise64b],
>    Text[Style[
>      "(" && S11Exercise64b[[1, 1]] && "," && S11Exercise64b[[1, 2]]&& ")",
> FontSize -> 18], {.9*S11Exercise64b[[1, 1]] + 30, .9*S11Exercise64b[[1, 2]]
> + .2}],
>    }
>  ]
>
>
> Please note, for this example, I am the first point (0, 120).
>
> The line that begins with the "(" && S11Exercise64b...is my attempt to
> extract the coordinates from the given list.  Thus, next to the point, it
> should read (0,120).  However, I am getting ( ^ 0^, ^ 120 ^).  Basically,
> my lack of knowledge concerning strings is one of my issues.
>
> But, as you can see, once fixed, I'd have to create a Text[Style[ line for
> every ordered pair that I have in the list.  Is there a way to automate
> this process?  Again, a lack of know-how leads to now knowing how to do For
> loops.
>
> Any help is always greatly appreciated.
>
> Thanks in advance!
>
> Mike


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