Sorry for the comment !
I use Evince
Le dim. 12 mai 2024 à 17:30, Hans Hagen <j.ha...@xs4all.nl> a écrit :
> On 5/12/2024 3:57 PM, Fabrice Couvreur wrote:
> > Hi,
> > When I want to draw the curve which corresponds to n=60 (blue curve), it
> > doesn't seem possible: I don't understand.
> > Thanks
> > Fabrice
> >
> > \startMPpage[offset=1DK]
> >
> > numeric u;
> > u = 6cm;
> >
> > interim linejoin := mitered;
> > interim ahangle := 30;
> >
> > path xx, yy;
> > xx = ( (-0.3,0) -- 1.4 right) scaled u;
> > yy = ( (-0.1,0) -- 1.8 right) rotated 90 scaled u;
> >
> > def compute_curve(suffix f)(expr xmin, xmax, xinc) =
> > ((xmin,f(xmin))
> > for x=xmin+xinc step xinc until xmax:
> > .. (x,f(x))
> > endfor)
> > enddef;
> >
> >
> > for i = 1 upto 4:
> >
> > vardef f(expr x) =x+exp(-i*x) enddef;
> >
> > path curve;
> >
> > curve = compute_curve(f,-0.4,1.4,0.0001) scaled u;
> >
> > draw curve;
> >
> > endfor;
> >
> > vardef f(expr x) =x+exp(-6*x) enddef;
> >
> > path curve;
> >
> > curve = compute_curve(f,-0.4,1.4,0.0001) scaled u;
> >
> > draw curve;
> >
> > vardef f(expr x) =x+exp(-15*x) enddef;
> >
> > path curve;
> >
> > curve = compute_curve(f,-0.4,1.4,0.0001) scaled u;
> >
> > draw curve;
> >
> >
> > vardef f(expr x) =x+exp(-60*x) enddef;
> >
> > path curve;
> >
> > curve = compute_curve(f,-0.4,1.4,0.0001) scaled u; ->>>>> not
> > drawn
>
> best put a comment before the ->>>>>>>
>
> > draw curve withcolor blue;
> >
> >
> > drawarrow (0,0) -- (u,0) withpen pencircle scaled 1.5bp;
> > drawarrow (0,0) -- (0,u) withpen pencircle scaled 1.5bp;
> >
> >
> > label.urt("A",(0,1u));
> >
> > draw xx;
> > draw yy;
> >
> > draw (1u,0) -- (1u,1.8u);
> >
> >
> > label.llft("0",(0,0));
> >
> > vardef mark_y_axis(expr value, name) =
> > save p; pair p; p = value * u * up;
> > draw (left--right) scaled 1 shifted p;
> > label.lft(name, p shifted 2 left);
> > enddef;
> >
> > for a = 1 upto 1:
> > mark_y_axis(a, "");
> > endfor
> >
> > mark_y_axis(1, "$1$");
> >
> >
> > vardef mark_x_axis(expr value, name) =
> > save p; pair p; p = value * u * right;
> > draw (up--down) scaled 1 shifted p;
> > label.bot(name, p shifted 2 down);
> > enddef;
> >
> > for a = 1 upto 1:
> > mark_x_axis(a, "");
> > endfor
> >
> > mark_x_axis(1, "$1$");
> >
> >
> > path rectangle;
> > rectangle = (-0.3u,-0.4u) -- (1.3u,-0.4u) -- (1.3u,-0.4u) --
> > (1.3u,1.4u) -- (-0.3u,1.4u)--cycle;
> >
> > clip currentpicture to rectangle;
> > \stopMPpage
> >
> your exp usage:
>
> exp(-60*-0.4)
>
> if you see what huge numbers come out of that, like
>
> -51.006602 11100558579.857309 l
> -50.989594 11034154639.123087 l
> -50.972586 10968147929.149401 l
> -50.955579 10902536073.687559 l
> -50.938571 10837316710.703716 l
>
> you could imagine a viewer crapping out on that because no matter what
> one clips it still is 'kind of drawn', so what viewer do you use?
>
> Hans
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
>
>
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> ___________________________________________________________________________________
>
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl /
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