Received this from Andrei on my mail but it wasn't posted here:
*Tomas,I realise that your package provides an abstraction for finding the contours, my question was, once I have them, how can I visualize them. Matplotlib & friends use their own algos for finding the contours in the first place, so that defeats the purpose of using contour.jl in the first place. I suppose in the end it is equivalent to Oliver's question.* Den fredag den 4. juli 2014 09.21.19 UTC+2 skrev Oliver Lylloff: > > I really like this new feature. > > I was thinking of adding a contour functionality to PGFplots ( > https://github.com/sisl/PGFPlots.jl). I think this could be done by > writing the arrays of contour lines as coordinates in a pgfplot > environment. How would you convert the lines Array{Curve2{Float64},1} to > Array{Float64,2}? I guess that is also what current or future plotting > packages would want to do? > > Best, > Oliver > > Den torsdag den 3. juli 2014 17.19.50 UTC+2 skrev Tomas Lycken: >> >> The purpose of the Contour.jl package isn’t really to provide that part >> of the functionality - but rather an abstraction over *finding* the >> contours in the first place, that plotting packages can make use of. If you >> only want the contours in order to plot them, it’s better to use one of the >> plotting packages directly. >> >> Contour plots are already available in PyPlot (using the matplotlib api >> <http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.contour>), >> and at least to some extent in Gadfly >> <https://github.com/dcjones/Gadfly.jl/issues/293>. I don’t know if or >> how Winston or others do contour plots, but if they can, they'll probably >> show them off in the docs =) >> >> // T >> >> On Wednesday, July 2, 2014 4:16:32 PM UTC+2, Andrei Berceanu wrote: >> >> Great work, congratulations for the package. I have a short question. >>> Once I get an array of Curve2 type, how can I get a graphical >>> representation of it? I mean, in Winston/Gaston/PyPlot/whatever. >>> >>> On Sunday, June 29, 2014 12:34:28 AM UTC+2, Tomas Lycken wrote: >>>> >>>> Huzzah! >>>> >>>> We’ve just released Contour.jl <https://github.com/tlycken/Contour.jl>, >>>> a light-weight package that provides an algorithm to calculate iso-lines >>>> of >>>> a scalar 2D-field f(x,y), such as those shown on a contour plot. The >>>> current implementation uses the Marching Squares >>>> <http://en.wikipedia.org/wiki/Marching_squares> algorithm, and returns >>>> the contour lines in an array of ContourLevel instances, that provide >>>> an abstraction over the actual implementation of curves as geometrical >>>> objects. Currently lists of Vector2s from ImmutableArrays are used to >>>> represent curves, but the idea is that if e.g. a package with general >>>> geometry items emerges, we can seemlessly switch to that. >>>> >>>> Our hopes is that other packages that have use for isolines (e.g. all >>>> plotting packages that want to plot contours) use this package instead of >>>> each carrying their own implementation, but use cases are of course not >>>> limited to plotting. (I wanted to put this together because I needed to >>>> calculate volumes inside axisymmetric isosurfaces, and this solved a large >>>> part of that problem…) >>>> >>>> Please, kick the tires and see what you can do with this! =) >>>> >>>> Finally, a big thanks to Darwin Darakananda >>>> <https://github.com/darwindarak>, who’s done almost all the coding. >>>> >>>> // Tomas >>>> >>>> >>> >> >
