ST_phi2d

 Convert sediment grain size from phi to d (m)

 function [d] = ST_phi2d(phi)

 DESCRIPTION:
    Convert a sediment grain size from phi to d (m)

 INPUT:
    phi: sediment grain size in phi scale

 OUTPUT:
    d: sediment grain size in m

 EXAMPLE USAGE
    d = ST_phi2d(2.5)

 Author(s):  
    Geoff Cowles (University of Massachusetts Dartmouth)

 Revision history
   
==============================================================================

0001 function [d] = ST_phi2d(phi)
0002 % Convert sediment grain size from phi to d (m)
0003 %
0004 % function [d] = ST_phi2d(phi)
0005 %
0006 % DESCRIPTION:
0007 %    Convert a sediment grain size from phi to d (m)
0008 %
0009 % INPUT:
0010 %    phi: sediment grain size in phi scale
0011 %
0012 % OUTPUT:
0013 %    d: sediment grain size in m
0014 %
0015 % EXAMPLE USAGE
0016 %    d = ST_phi2d(2.5)
0017 %
0018 % Author(s):
0019 %    Geoff Cowles (University of Massachusetts Dartmouth)
0020 %
0021 % Revision history
0022 %
0023 %==============================================================================
0024 
0025 %subname = 'ST_phid2';
0026 %fprintf('\n')
0027 %fprintf(['begin : ' subname '\n'])
0028 
0029 %------------------------------------------------------------------------------
0030 % calculate d and convert to m
0031 %------------------------------------------------------------------------------
0032 
0033 d = 2^(-phi);
0034 d = d*.001;
0035 
0036 %fprintf(['end   : ' subname '\n'])