INTERPLIN1  INTERPLIN1 Linear 1-D Interpolation


Usage
 
 Given a set of monotonically increasing x coordinates and a 
 corresponding set of y values, performs simple linear 
 interpolation to a new set of x coordinates. The general syntax
 for its usage is
 
    yi = interplin1(x1,y1,xi)
 
 where x1 and y1 are vectors of the same length, and the entries
 in x1 are monotoniccally increasing.  The output vector yi is
 the same size as the input vector xi.  For each element of xi,
 the values in y1 are linearly interpolated.  For values in xi 
 that are outside the range of x1 the default value returned is
 nan.  To change this behavior, you can specify the extrapolation
 flag:
 
    yi = interplin1(x1,y1,xi,extrapflag)
 
 Valid options for extrapflag are:
   -  'nan' - extrapolated values are tagged with nans
   -  'zero' - extrapolated values are set to zero
   -  'endpoint' - extrapolated values are set to the endpoint values 
   -  'extrap' - linear extrapolation is performed
 The x1 and xi vectors must be real, although complex types
 are allowed for y1.
 