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- W2049279416 abstract "When smoothing a function with high-frequency noise by means of optimal cubic splines, it is often not clear how to choose the number of nodes. The more nodes are used, the closer the smoothed function will follow the noisy one. In this work, we show that more nodes mean a better approximation of Fourier coefficients for higher frequencies. Thus, the number of nodes can be determined by specifying a frequency up to which all Fourier coefficients must be preserved and increasing the number of nodes until this criterion is met. A comparison of the corresponding smoothing results with those obtained by filtering using moving average and moving median filters of corresponding length and a low pass with corresponding high-cut frequency shows that optimal cubic splines yield better results as they preserve not only the desired low-frequency band but also important high-frequency characteristics." @default.
- W2049279416 created "2016-06-24" @default.
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- W2049279416 date "2008-03-01" @default.
- W2049279416 modified "2023-10-01" @default.
- W2049279416 title "A frequency criterion for optimal node selection in smoothing with cubic splines" @default.
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- W2049279416 doi "https://doi.org/10.1111/j.1365-2478.2007.00663.x" @default.
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