arraysin.m

数字通信第四版原书的例程

function [sys, x0, str, ts] = arraysin(t, x, u, flag, num)
%ARRAYSIN outputs function sin for a given vector input.
%   This M-file is designed to be used in a SIMULINK S-function block.
%   This function inputs NUM-array of input signal and outputs the
%   sin function of the same array size signal.

%   Wes Wang 4/13
%       Copyright (c) 1995-96 by The MathWorks, Inc.

if flag == 3
    sys = sin(u);
elseif flag == 0
    sys=zeros(7,1);
    %one sample rate
    sys(7) = 1;
    %to be determined input number
    sys(4) = num;
    %to be determined output number
    sys(3) = num;
    x0 = [];
    ts = [-1, 0];
else
    sys = [];
end;