Oooh, I like it! How about VanDeGraph? Roger
> On Nov 4, 2020, at 3:03 PM, scott--- via use-livecode > <use-livecode@lists.runrev.com> wrote: > > I assume the expanded version will be called SedanDeGraph. > — > Scott > >> On Nov 4, 2020, at 10:09 AM, Roger Guay via use-livecode >> <use-livecode@lists.runrev.com> wrote: >> >> Hi Alex, >> >> Thanks for your continued interest in my little project. I have succeeded in >> implementing a multiple polygon approach, but it ain’t elegant as they say! >> >> I seem to recall that I learned a lot from your GraphMaker some time ago, >> but as I try to review your latest on your website, I run into repeated >> errors about “can’t find handler gmSetCustomMarker”. I can’t seem to make >> any headway to resolve this. Am I supposed to do something with the >> “Library”? I could not find instructions anywhere. >> >> Meanwhile, I should explain further that I am trying to expand on a stack >> that I built 2 or 3 years ago called CoupDeGraph which you can find in the >> Example Stacks of LiveCode. Put simply, I am currently trying to expand on >> CoupDeGraph to be able to handle double-valued equations. >> >> Again, thanks for your help >> >> Roger >> >>> On Nov 3, 2020, at 4:48 PM, Alex Tweedly via use-livecode >>> <use-livecode@lists.runrev.com> wrote: >>> >>> On 31/10/2020 02:28, Roger Guay via use-livecode wrote: >>> >>>> Lots of clever ideas here, Alex, but I think you’re missing the point of >>>> what I ultimately want to do. I'm building a plotting program for which I >>>> want to plot any equation including those that have multiple values of y >>>> for a given x. An equation might branch at any point and might even have >>>> multiple branches both of which are unknown before plotting. >>>> >>>> Of course, there’s always the possibility that I’m not fully comprehending >>>> your suggestions??? What does NB stand for? Are you suggesting creating a >>>> new polygon every time a branch is detected? That just might work?! >>> >>> Hi Roger. You're right - I missed the point; I jumped to the assumption >>> that you were asking about a fairly small, specific issue - so leapt too >>> quickly to a code sample. But before I address the general question(s), let >>> me get the little points out of the way :-) >>> >>> NB - sorry, kind of common usage in British English. Actually, it's from a >>> Latin phrase - "Nota Bene" - meaning "note well". So basically just 'take >>> note of'. >>> >>> "a new polygon every branch" - yes, perfectly possible. Also possible is >>> what I did in the first case of the code sample - a new 'sequence of >>> points' for each branch, and then stitch those together (with blank lines >>> between) into a single polygon; but that's, for now, a detail. >>> >>> The essence of the problem is that your app will (somehow) develop a number >>> of 'sequences of *data* points' - and then those need to be translated into >>> equivalent sets of *display* points (by either a plotting library, or by >>> your own code) to allow it to be displayed appropriately. >>> >>> There are at least two possible plotting libraries that might do what you >>> want (or do something close enough that they could be useful). By >>> coincidence, they were both discussed at the San Jose LC conference in >>> 2019.If you have access to the video / papers from that you might already >>> have some of the info you need; I don't know if the conference papers are >>> ever put out for more general usage later. >>> >>> Option A. Monte described a wrapper for the JSPlot library. It's a very >>> powerful library capable of many kinds of graphs / plots, and very quick >>> and capable. The most obvious downside is that it needs to be used within a >>> browser widget - but well worth looking at it if you can. >>> >>> Option B. I did a library called "GraphMaker" - a pure-Livecode plotting >>> library. It is (I think) fairly easy to use - but that may not be the case >>> for someone else coming to it new. I know it can handle this case of >>> bifurcating plots (using multiple sequences of data points). The conference >>> slides were a decent, if very brief, introduction; the lengthier >>> documentation was, maybe, not quite complete. However, it does come with a >>> demo app that uses the library to draw a variety of graph types. Main >>> advantage is it's pure LC, and hopefully easy to use - both in >>> understanding and in ease of integration into an app (you just create a >>> suitable group to contain the graph, set its rect properly and pass in all >>> the point data along with various parameters. It has nowhere near the >>> coverage of different graph types that JSPlot does - it's basically line, >>> bar and scatter plots, with primary X-axis, and can have shading, etc. >>> >>> Option C. Roll your own. >>> >>> I'd certainly suggest investigating the use of an existing library first. >>> There's quite a lot of effort needs to go into determining how to scale the >>> data to the space available, how to label the axes, how to add tick marks, >>> grid lines and (perhaps) multiple Y-axes. That stuff probably accounted for >>> 90% of the effort of creating the library. >>> >>> If you'd like to try out my library, the latest version can be found at >>> >>> https://www.tweedly.org/lcms.lc/GraphMaker >>> >>> (sorry - I haven't formatted it into my usual download structure - so this >>> is simply a page that gives links that allow you to download the 2 files >>> you need and 2 more files you don't need.) >>> >>> Of course, I'll be happy to help out in any way I can with it. >>> >>> Alex. >>> >>> P.S. the demo app includes an example of a 'branching' plot (Graph 3). >>> >>> >>> _______________________________________________ >>> use-livecode mailing list >>> use-livecode@lists.runrev.com >>> Please visit this url to subscribe, unsubscribe and manage your >>> subscription preferences: >>> http://lists.runrev.com/mailman/listinfo/use-livecode >> >> _______________________________________________ >> use-livecode mailing list >> use-livecode@lists.runrev.com >> Please visit this url to subscribe, unsubscribe and manage your subscription >> preferences: >> http://lists.runrev.com/mailman/listinfo/use-livecode > > > _______________________________________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
