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Re: evenly spaced vector [message #81330 is a reply to message #81182]

Thu, 06 September 2012 10:22

sivan
Messages: 13
Registered: August 2012

Junior Member

On Thursday, September 6, 2012 5:00:29 PM UTC+3, Craig Markwardt wrote:
> On Thursday, September 6, 2012 7:22:21 AM UTC-4, sivan wrote:
>
>> On Sunday, September 2, 2012 11:46:56 PM UTC+3, Craig Markwardt wrote:
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>> i appreciated for your reply.
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>> it doesn't matter whether I use arcsample or not.
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>> the problem is that i don't place evenly spaced points along the curve.
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>> modified or unmodified arcsample routine doesn't work as requested. i tried both.
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> I tried this example:
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> x0 = randomn(seed,5) & y0 = randomn(seed,5)
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> arcsample, x0, y0, x, y
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> plot, x0, y0 & oplot, x, y, psym=1
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> plot, sqrt((x(1:*)-x)^2 + (y(1:*)-y)^2)
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> It looks evenly spaced to me.
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> The points are evenly spaced along the (spline interpolation) path, but that does not necessarily mean equally distant from each other (linear interpolation).
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> ARCSAMPLE up-samples by a factor of 100. If you modify that to a larger and larger number, then neighbor points will tend to be more and more equidistant.
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> CM

this is the graphic:
https://docs.google.com/open?id=0B8iEehZBld1OLUVXdndEQ2RwcE0

as you can see, arcsample doesn't work properly. moreover, some points fall outside the curve.

this is the code and the data:
https://docs.google.com/open?id=0B8iEehZBld1OaEI5UkJiTVFkelk

inform me if links are broken.

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[Message index]

		evenly spaced vector By: sivan on Tue, 21 August 2012 11:21
		Re: evenly spaced vector By: Craig Markwardt on Sun, 02 September 2012 13:46
		Re: evenly spaced vector By: sivan on Thu, 06 September 2012 04:22
		Re: evenly spaced vector By: sivan on Sun, 02 September 2012 07:27
		Re: evenly spaced vector By: Craig Markwardt on Fri, 07 September 2012 07:06
		Re: evenly spaced vector By: sivan on Fri, 07 September 2012 12:40
		Re: evenly spaced vector By: sivan on Fri, 07 September 2012 00:17
		Re: evenly spaced vector By: Craig Markwardt on Thu, 06 September 2012 12:41
		Re: evenly spaced vector By: sivan on Thu, 06 September 2012 10:22
		Re: evenly spaced vector By: Craig Markwardt on Thu, 06 September 2012 07:00
		Re: evenly spaced vector By: Craig Markwardt on Fri, 07 September 2012 20:40
		Re: evenly spaced vector By: sivan on Wed, 19 September 2012 08:41
		Re: evenly spaced vector By: sivan on Sun, 02 September 2012 05:33

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