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Groups > comp.graphics.apps.gnuplot > #3777 > unrolled thread

Draw circle with standard form?

Started byLawrence Bottorff <borgauf@gmail.com>
First post2017-10-15 08:41 -0700
Last post2017-10-24 17:41 -0400
Articles 3 — 3 participants

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  Draw circle with standard form? Lawrence Bottorff <borgauf@gmail.com> - 2017-10-15 08:41 -0700
    Re: Draw circle with standard form? Karl Ratzsch <mail.kfr@gmx.net> - 2017-10-16 10:10 +0200
      Re: Draw circle with standard form? ruben safir <ruben@mrbrklyn.com> - 2017-10-24 17:41 -0400

#3777 — Draw circle with standard form?

FromLawrence Bottorff <borgauf@gmail.com>
Date2017-10-15 08:41 -0700
SubjectDraw circle with standard form?
Message-ID<60ca5673-4741-4fe6-b183-5c0cda561e14@googlegroups.com>
Would it be possible to plot a circle in an x,y cartesian graph by just giving the standard form, i.e., (x - h)**2 + (y - k)**2 = r**2 ... or some variation thereof like a circle centered on (0,0) x**2 + y**2 = r**2 ?

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#3780

FromKarl Ratzsch <mail.kfr@gmx.net>
Date2017-10-16 10:10 +0200
Message-ID<os1pgu$8e7$1@solani.org>
In reply to#3777
Am 15.10.2017 um 17:41 schrieb Lawrence Bottorff:
> Would it be possible to plot a circle in an x,y cartesian graph by just giving the standard form, i.e., (x - h)**2 + (y - k)**2 = r**2 ... or some variation thereof like a circle centered on (0,0) x**2 + y**2 = r**2 ?
> 

Gnuplot is not a symbolic math package.

It has to calculate the x and y values of each point on the circle from
one independent variable that you can sample over the circumference.

  plot sample [th=0:2*pi] "+" us (r*cos(th)):(r*sin(th))


 Karl

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#3798

Fromruben safir <ruben@mrbrklyn.com>
Date2017-10-24 17:41 -0400
Message-ID<osoc1f$487$1@reader2.panix.com>
In reply to#3780
On 10/16/2017 04:10 AM, Karl Ratzsch wrote:
> Gnuplot is not a symbolic math package.

so says you


It was originally created to allow scientists and students to visualize
mathematical functions and data interactively, but has grown to support
many non-interactive uses such as web scripting.

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