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Sample OPJ to download to try: Akima Interpolation.opj
Akima Spline is added as a new data plot line connection method new line connection method, and also added as a new interpolation method.
Akima Spline Interpolation method is available in three interpolation tools. It shows its advantage when you would like to maintain the curve oscillation trend after interpolation, especially when there is an outlier.
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