From: David Arnold <dwarnold45@cox.net>
Subject: Re: Clipping again
Date: Sun, 25 Jun 2006 12:58:22 -0700 [thread overview]
Message-ID: <00126185-2A78-4687-9F91-DFE6AFB92A73@cox.net> (raw)
In-Reply-To: <6faad9f00606251237n70a922edi3b8e4e329446057@mail.gmail.com>
Mojca,
Good question of course.
However, I am using this for intermediate algebra students so the
graphs will be lines, absolute value, quadratics, polynomials,
rational functions, radical functions, exponential and logarithmic
functions.
In each case, I would adjust the window to see all important behavior
of the function, extrema, etc. So, for example, if I needed to draw
y=12-x^2, I would not clip this to the boundary (-10,-10)--(10,-10)--
(10,10)--(-10,10)--cycle, because that would chop off the top of the
parabola, and if I added arrows, it would look like I had two
branches. Rather, I might clip y=12-x^2 to the boundary (-10,-20)--
(10,-20)--(10,20)--(-10,20)--cycle in order to see the "turning
point" of the parabola.
That is, I would choose a boundary that would present arrow heads at
each end of the curve. In the case of rational functions, I would
clip each branch separately.
I hope this answers the question.
Thanks.
On Jun 25, 2006, at 12:37 PM, Mojca Miklavec wrote:
> On 6/25/06, David Arnold wrote:
>> Unfortunately, even though this works, mathematicians really want
>> arrows at each end of the graph. Easy enough to do with drawdblarrow
>> P withcolor blue, but the arrows then get clipped. What I really need
>> is to adapt the code below so that my function is clipped to the
>> boundary box, but then redrawn with arrows at each end of it. If
>> anyone can adjust my code to do that, it would be much appreciated,
>> and it would break down a barrier I've faced for years with metapost
>> coding.
>
> Just for clarification: What would you do with a "mexican hat"
> (x^4-4*x^2+4, y between 0 and 3) it if would cut the boundary 4 times?
> Use 4 arrows or just the two at the end?
>
> Mojca
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
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next prev parent reply other threads:[~2006-06-25 19:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-25 19:19 David Arnold
2006-06-25 19:37 ` Mojca Miklavec
2006-06-25 19:58 ` David Arnold [this message]
2006-06-25 20:14 ` Mojca Miklavec
2006-06-26 0:51 ` David Arnold
2006-06-25 21:32 ` Hans Hagen
2006-06-26 9:39 ` Mojca Miklavec
2006-06-26 15:01 ` Hans Hagen
2006-06-26 19:51 ` David Arnold
2006-06-26 20:35 ` Mojca Miklavec
2006-06-26 22:30 ` Hans Hagen
2006-06-26 22:44 ` Mojca Miklavec
2006-06-26 23:04 ` Hans Hagen
2006-06-27 2:27 ` David Arnold
2006-06-27 9:01 ` Mojca Miklavec
2006-06-27 9:32 ` Hans Hagen
2006-06-27 1:04 ` David Arnold
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