FUNCTION N_VisetoptIfc(s_option, s_value)

character(len=*), intent(in) :: s_option
character(len=*), intent(in) :: s_value
DESCRIPTION 
To set options in the vertical interpolation class.  The option and the value 
to which it is to be set are passed as character strings.  The strings are 
identified (in a case-sensitive manner!) and the identified option is set.  
It remains set until this routine is called again with the same option.

Author: Jeff Blezius - Sept 2002
ARGUMENTS

Input:
s_option	string representing the option to be set: one of 'interptype', 'extraptype'
s_value	string representing the value to which the option is to be set. Possible values for the option, 'interptype', are: 'nearestneighbour', 'linear', 'cubicwithderivs', 'cubiclagrange'. Possible values for the option, 'extraptype', are: 'clamped', 'lapserate', 'surface', 'surfacewind'
Output:
N_VisetoptIfc	error indication: 0 means 'no error'; see $ARMNLIB/include/ViConstants_f90.h for the significance of other values

SEE ALSO