[NTG-context] metafun 2

Aditya Mahajan adityam at umich.edu
Wed Aug 14 16:53:28 CEST 2019


On Wed, 14 Aug 2019, Otared Kavian wrote:

> Hi Hans,
>
> Thank you very much for the new features! I haven't yet read all the mag-1104-mkiv.pdf where you explain some of them, but after modifying one of your examples, I noticed that some funtions get a strange graph, which is probably due to the fact that metafun2 is interpolating between points in a way which is not correct.
> For instance, in the following example (which is a slight modification of yours), the curve drawn is not a graph, in the sense that for some values of x it seems to be two or more values of y.
>
> How does metafun 2 traces the curve between two discretization points?
>
> Best regards: OK
>
> %%% begin draw-2.tex
>
> \starttext
> \startMPcode{doublefun}
> draw lmt_function [
> 	xmin =  1.0, xmax = 2.5066283, xstep = .1,
> 	ymin = -2, ymax =  2,
> %	xticks = "bottom", xsmall = 80, xlarge = 20,
> %	yticks = "left", ysmall = 40, ylarge = 4,
> 	code = "1.5 * math.sin(2*x^2)",
> 	xlabels = "yes",
> 	ylabels = "yes",
> 	ycaption = "\strut\tfd \rotate[rotation=90]{vertical}",
> 	xcaption = "\strut\tfd horizontal",
> 	pointsymbol = "dot", pointsize = 4, pointcolor = "orange",
> 	sx = 2mm, sy = 4mm, linewidth = .025mm, offset = .1mm,
> 	]
> 	xsized 8cm ;
> \stopMPcode
>
> \stoptext

This looks like a typical .. vs -- issue. I think there is a way to change 
how the points are connected, but I'll have to look at the code again.

Aditya


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