Interpolate will accept a DataFrame or SeriesFloat64 and interpolate the missing values.

Backward interpolates nil values from right to left.

Extrapolation estimates values by extending a known sequence of values beyond what is certainly known.

Forward interpolates nil values from left to right.

Interpolation estimates values between two known values.

BackwardFill will fill nil values using the actual value on the right side of a segment of nil values.

ForwardFill will fill nil values using the actual value on the left side of a segment of nil values.

InterpolateOptions is used to configure the Interpolate function.

Lagrange will fill nil values using the Lagrange interpolation algorithm.

Linear will fill nil values using a straight line between the actual values of a segment of nil values.

Spline will fill nil values using the spline algorithm.

FillDirection is used to set the direction that nil values are filled.

FillRegion is used to set the fill region.