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    %% Designate Constant Value for All Queries Outside the Domain of x  

% Copyright 2015 The MathWorks, Inc.


%% 
% Define the sample points, |x|, and corresponding sample values, |v|. 
x = [-3 -2 -1 0 1 2 3];
v = 3*x.^2;  

%% 
% Specify the query points, |xq|, that extend beyond the domain of |x|.  
xq = [-4 -2.5 -0.5 0.5 2.5 4];  

%% 
% Now evaluate |v| at |xq| using the |'pchip'| method and assign any values
% outside the domain of |x| to the value, |27|.  
vq = interp1(x,v,xq,'pchip',27)