Function approx1 

pub fn approx1<T, P>(
    input: &Array<T>,
    pos: &Array<P>,
    method: InterpType,
    off_grid: f32,
) -> Array<T>
where
    T: HasAfEnum + FloatingPoint,
    P: HasAfEnum + RealFloating,

Perform signal interpolation for 1d signals

Parameters

• input is the input Array
• pos Array contains the interpolation locations
• method indicates the type of interpolation method that be used. It is of type enum InterpType
• off_grid is the value that will set in the output Array when certain index is out of bounds

Return Values

An Array with interpolated values