Neil DeGraph Tyson? > On Nov 4, 2020, at 3:09 PM, Roger Guay via use-livecode > <use-livecode@lists.runrev.com> wrote: > > 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
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