annotate sequences/expdata.m @ 2:7357e1dc2ad6

Simplified scheduler library with new schedule representation.

function y=expdata(A,B,N,M)
% expdata - exponential data sequence
%
% expdata :: 
%    real  ~'initial value',
%    real  ~'final value',
%    natural ~'number of steps (sequence length is steps+1),
%    M:natural ~'buffer size'
% -> seq [[1,M]].

if nargin<4, M=1; end

lA=log(A);
k=(log(B)-lA)/N;
y=unfold(@ls1,0:M-1);
%y=windowdata(linspace(A,B,N),M,M);

function [X,I]=ls1(I), 
	surp=I(end)-N;
	if surp>=0,
		X=exp(lA+k*I(1:end-surp)); 
		if surp<M, X(end)=B; end
	else
		X=exp(lA+k*I); 
	end
	I=I+M; 
end

end