# \#bsplinekit

**URL:** https://discourse.julialang.org/tag/bsplinekit/1234.md

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## [Interpolate 2d function](https://discourse.julialang.org/t/interpolate-2d-function/96914)

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**Author:** [@roi.holtzman](https://discourse.julialang.org/u/roi.holtzman)\
**Replies:** 14\
**Last updated:** [March 4, 2025, 4:29pm UTC](https://discourse.julialang.org/t/interpolate-2d-function/96914 "2025-03-04T16:29:32Z")

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I want to interpolate 2d data. I have a function f(x, y) that is sampled as follows. For any y value in some array y\_arr, I have the a set of points x\_arr. Note that x\_arr is different for any y, and even the boundaries …

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## [How to smooth zig-zag?](https://discourse.julialang.org/t/how-to-smooth-zig-zag/98914)

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**Author:** [@ellocco](https://discourse.julialang.org/u/ellocco)\
**Replies:** 3\
**Last updated:** [May 24, 2023, 10:13am UTC](https://discourse.julialang.org/t/how-to-smooth-zig-zag/98914 "2023-05-24T10:13:52Z")

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How to smooth a zig-zag-line with only a few points? I have read the following topics here in this forum: smoothing-interpolation-for-tachometer-data smoothing-data-with-dates But I am still struggling with my sort o…

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## [BSplineKit Spline Derivative](https://discourse.julialang.org/t/bsplinekit-spline-derivative/91961)

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**Author:** [@ziolai](https://discourse.julialang.org/u/ziolai)\
**Replies:** 5\
**Last updated:** [December 22, 2022, 1:08pm UTC](https://discourse.julialang.org/t/bsplinekit-spline-derivative/91961 "2022-12-22T13:08:34Z")

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BSplineKit has in Library =\> Data Interpolation =\> Functions, the example xs = -1:0.1:1; ys = cospi.(xs); S = interpolate(xs, ys, BSplineOrder(4)) (Derivative(1) \* S)(-1) For me, this example fails with no method ma…