interpolate_by_index: interpolate_by_index

In willdrysdale/wsdmiscr: wsdmiscr

interpolate_by_index

Description

interpolates between a coloumn between a defined start and end index

Usage

interpolate_by_index(
  df,
  index_start,
  index_end,
  interp_col,
  index = "date",
  f = zoo::na.approx,
  extend = F
)

Arguments

index_start	value of index at begining of index. index must be unique. length must equal length(interp_col)
index_end	end of index value
interp_col	names of column, or vector of names to interpolate over
index	name of index column, default "date"
f	function to use for interpolation, default zoo::na.approx
d	dataframe to interpolate over
extrap	logical. when true, na.locf is applied to the whole interpolation column after the initial interpolation, expand the first and last values to the whole column

Author(s)

W. S. Drysdale

willdrysdale/wsdmiscr documentation built on Aug. 26, 2023, 12:31 a.m.