On Wednesday 12 February 2014 16:15:10 John Kane wrote: > I have been playing with TikZ a bit the last week or so and I know that > it will do graduated shading, there is a good discussion of it in the > manual but this ?? > > What is the data and the graph about? How was it created originally?
It is from a book of Winfree "The timing of biological clocks" (Scientific American Library 1986) and describes in color, what happens with the heart beat if the heart is stimulated electrically at different phases (x axis, one heart beat takes about one second) and the stimulus size is varied (y axis, stimulus size increases vertically). So time is color coded and the new phase can be seen by its color. There is a point of singularity, where the different colors meet, which can be reached by using a certain phase (yellow) and strength. If applied to the heart (rabbit), it stops beating. In humans this happens occasionally during games if the ball or something else hits the chest (called Commotio cordis, sudden stop of the heart). I do not know how it was created originally, since Art Winfree unfortunately passed away. I saw in the examples coming with TikZ that HSV shading, J- curve,RGBcolor mixing and RGBcolor triangle might be starting points, but if somebody has some experience on this line, I would appreciate some hints. Wolfgang > > Since I am on Ubuntu the image opened very nicely for me. > > > > > On Wednesday, February 12, 2014 9:59:00 AM, Wolfgang Engelmann > <engelm...@uni-tuebingen.de> wrote: > > There was a discussion on graphics tools -tikz and ktikz (see below). > I wonder, whether this program can be used to produce an image like the > one I have attached. Wolfgang > > ############### > Subject: Re: Graphics Tools > Date: Saturday 21 July 2012, 11:08:38 > From: Jürgen Spitzmüller <sp...@lyx.org> > To: lyx-users@lists.lyx.org > > > Paul A. Rubin wrote: > > > If I did use TiKZ, I'd prefer to put the drawing in a separate file. > > > > I do that for more complex diagrams, or ones I might hypothetically > > reuse elsewhere. To embed them in LyX, I use either "input file" or > > "include file" (can't recall which). Works like a charm. > > > Input. > > If you're on Linux, there's a nifty little tikz editor with instant > preview and command completion: > http://kde-apps.org/content/show.php/ktikz?content=63188 > > Jürgen
