# To create an spline with the same size is not exact

**URL:** https://discourse.vtk.org/t/to-create-an-spline-with-the-same-size-is-not-exact/633
**Category:** Support
**Created:** [March 28, 2019, 5:05pm UTC](https://discourse.vtk.org/t/to-create-an-spline-with-the-same-size-is-not-exact/633 "2019-03-28T17:05:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![zandarina](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/z/4af34b/32.png) [@zandarina](https://discourse.vtk.org/u/zandarina)
#### Post date: [March 28, 2019, 5:05pm UTC](https://discourse.vtk.org/t/to-create-an-spline-with-the-same-size-is-not-exact/633/1 "2019-03-28T17:05:02Z")

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Dear all,

I want to create an spline with the same size. I have used some ideas of the forum. But the value is not exact. It does not change much. But i want to know why there is difference. I use splinefilter as you mentioned in this forum and the subdivision of n. Why are not exactly the same the distances?

Thanks in advance

The distances i get from the spline

distance:9.98431  
distance:9.95855  
distance:9.92094  
distance:9.97941  
distance:9.89068  
distance:9.89533  
distance:9.89679  
distance:9.95559  
distance:10.0006  
distance:10.0048