function [transformedUnit]= changeUnit2cm(originalValue,units)
%
% transformation of length units.
%
switch units
    case{'inch','in'}
        y=originalValue*2.54;
    case{'feet','ft'}
        y=originalValue*2.54*12;
    case{'meter','m'}
        y=originalValue*100;
    case{'centimeter','cm'}
        y=originalValue;
    otherwise
        disp(['Unknown Units:' units])
        y=nan
end
transformedUnit=y;