Re: get a table of coordinates from an image of a graph
- To: mathgroup at smc.vnet.net
- Subject: [mg112472] Re: get a table of coordinates from an image of a graph
- From: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>
- Date: Thu, 16 Sep 2010 06:02:17 -0400 (EDT)
- References: <i6q0jk$l41$1@smc.vnet.net>
Hi Peter, I sometimes use the "Get Coordinates" tool (select graph, then shift- period to activate the tool) to do this manually. First, I get the coordinates of the origin and a few points on the axes to determine the scale, and then use the tool to select and copy/paste as much of the coordinates of the graph as needed. Would be cool if this would be automated, but I am not aware of any Mathematica tool that does this. Cheers -- Sjoerd On Sep 15, 10:37 am, Peter Lindsay <p... at me.com> wrote: > I don't know if this is even possible, but if it is then someone on this list will know: > > I have a jpg image with a "wobbly" line cartesian graph [ X-Y axes etc ]. > > Is it possible by importing it, to get mathematica to "read" the graph and produce a table of coordinates ? > > Obviously the table could be scaled subsequently to produce desired results to match the original graph. > > Sorry if this is a daft question > > Peter Lindsay