Re: Get Graphics Coordinates accuracy

*To*: mathgroup at smc.vnet.net*Subject*: [mg92608] Re: Get Graphics Coordinates accuracy*From*: John Jowett <John.M.Jowett at gmail.com>*Date*: Wed, 8 Oct 2008 06:24:39 -0400 (EDT)*References*: <gbflnv$682$1@smc.vnet.net>

Thanks (belatedly - I've been away from the newsgroup for a couple of weeks) to David, Jens and Maxim for these interesting solutions. I was surprised to learn from Maxim that Plot appears to have undocmented options like CoordinatesToolOptions. I found some more about this interesting option at http://blog.wolfram.com/2008/03/11/get-coordinates-new-in-602/ John On Sep 25, 11:30 am, John Jowett <John.M.Jow... at gmail.com> wrote: > I came across a limitation in the mechanism for copying coordinates of > points in 2D graphics (the Get Coordinates button in the Drawing Tools > palette) in V6.03. > > Consider the following plot of a sine wave > > Plot[Sin[2 x], {x, 20270, 20275}] > > When I try to select and paste the coordinates of the two crests of > the wave, I typically get two points with the same x-coordinate > > {{2.027*^4, 0.99}, {2.027*^4, 0.99}} > > whereas I would expect the two x-coordinates to be around > 20270.3 and 20273.5, values which are well separated on the plot. > > This seems to happen because the Get Coordinates function only returns > the first 4 digits of the coordinates. > > Does anyone know of a way to fix this ? Obviously, in this > demonstration example, I could change variables to x1=x-20270 but in > the more complicated problem I am working on, this is not so easy. > > John Jowett