Interpolate the roots/positions of sign changes

版本 1.0.0 (1.7 KB) 作者: Max Mustermann

This function interpolates the x-positions of roots/sign changes in the data in y and adds the roots to the vectors.

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更新时间 2021/12/6

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Interpolate the x-positions of roots/sign changes in the data in y. This is helpful if you want to treat the positive and negative parts of y differently.

Example:

has three roots at

and

. The vector

x = linspace(-3, 3, 50)

does not include these roots.

y = x.^3 - 4.*x;
[xNew, yNew] = interpolateRoots(x, y)

interpolates the roots to x = -1.9984

and

and returns the extended vectors xNew and yNew including these interpolated roots at the corresponding positions. xNew and yNew are 53 elements long while x and y contain 50 elements.

引用格式

Max Mustermann (2024). Interpolate the roots/positions of sign changes (https://www.mathworks.com/matlabcentral/fileexchange/103045-interpolate-the-roots-positions-of-sign-changes), MATLAB Central File Exchange. 检索来源 2024/4/28.