function f = expeval2(alpha)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% function f = expeval2(alpha)
% Given alpha, we calculate the vector of 
% residuals f in the fit of the data (t,y) by the
% function
%   ytest = sum x(i) exp(alpha(i) t)
% where the parameters x(i) are determined by solving
% the linear least squares problem using the function
% expfit.
%
%  expeval2.m Dianne P. O'Leary   02/04
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

global y t

[x,f] = expfit(alpha,t,y);