Mathematica 9 is now available
Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2013

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Getting the plotted data from a graph

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131213] Re: Getting the plotted data from a graph
  • From: Themis Matsoukas <tmatsoukas at me.com>
  • Date: Mon, 17 Jun 2013 06:30:32 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • Delivered-to: l-mathgroup@wolfram.com
  • Delivered-to: mathgroup-outx@smc.vnet.net
  • Delivered-to: mathgroup-newsendx@smc.vnet.net

> Dear All,
> 
> My question is regarding the plotted data points in a
> graph. Assume you draw a graph of sinx as: 
> 
> g1 = Plot[Sin[x], {x, -Pi, Pi}, 
> Frame -> True, FrameLabel -> {"x", "y"},
> "y"}, ImageSize -> 2.6*72
>     ]
> 
> then how can I get all of the data points of this
> graph by using mathematica?
> 
> This is really important for me and I couldn't find
> the answer anywhere online!
> 
> Thank you for your help in advance!
> 
> Best,
> Lily
> 

If you do 

FullForm[g1] 

you will see that the data are nested inside Line[...] in the form of x-y pairs. Here is one way to get them out:

g1 = Plot[Sin[x], {x, -Pi, Pi}, Frame -> True, 
  FrameLabel -> {"x", "y"}, ImageSize -> 2.6*72]
data = Flatten[List @@ g1[[1, 1, 3, 2]], 1];
ListPlot[data]

Themis



  • Prev by Date: Re: ListPlot3D
  • Next by Date: Re: computation of two-point objects
  • Previous by thread: Re: Getting the plotted data from a graph
  • Next by thread: How does one get data out of a TemporalData object?