1.  NAME

  fillgaps - Fill gaps within a vector

  2.  SYNOPSIS

  v = fillgaps(v, imeth, extrapol )

  3.  DESCRIPTION

  Gaps within a vector are NaN data. Data gaps inside the elements of
  the vector are filled using interpolation function interp1, and the
  method specified by imeth. If extrapolation is required, then gaps at
  the beginning and end of the vector are filled with the nearest non-
  NaN value.

  4.  PARAMETERS

     v  Data vector.

     imeth
        Interpolation method,as those used for interp1. If zero,then
        default method linear is used.

     extrapol
        If non-zero then also extrapolate data at the vector extremi-
        ties."

  5.  RETURNS

     v  Data vector with gaps filled.

  6.  AUTHORS

  Pierre Jaccard, Geophysical Institute, University of Bergen, 1999