Differences between Cubic Spline, Hermite and Akima interpolations
Red – Input data
Green – Hermite interpolation
Purple – Akima interpolation
Blue – Cubic Spline interpolation

• Blue – Cubic Spline the best interpolation giving the user the smoothest shape
• Green – Hermite is compromise between sharp Akima and smooth Cubic Spline interpolation
• Purple – Akima gives a sharper interpolation compared with Cubic Spline and Hermite interpolation