基于MATLAB的离散信号时域处理，编写函数如stepshift(n0,n1,n2)实现u(n)的位移序列u(n-n0),n1<=n=<n2,绘制该函数的图形。设n1=0,n2=9,n0=2

以下是函数代码：

function [y, n] = stepshift(n0, n1, n2)
%STEP SHIFT function shifts unit step function by n0
%   [y, n] = stepshift(n0, n1, n2) generates a shifted unit step sequence
%   given the shift value n0 and the range of n values from n1 to n2.
%   The output is in the form of two arrays, y and n, where y is the 
%   shifted sequence and n is the corresponding time index.
    
    % Generate the time index array from n1 to n2
    n = n1:n2;
    
    % Generate the shifted sequence
    y = zeros(size(n));
    y(n >= n0) = 1;
    y = y(n1:end);
    
    % Shift the time index by n0
    n = n + n0;
    n = n(n >= n1);
end

以下是绘图代码：

% Set the parameters
n0 = 2;
n1 = 0;
n2 = 9;

% Generate the shifted sequence
[y, n] = stepshift(n0, n1, n2);

% Plot the sequence
stem(n, y);
xlabel('n');
ylabel('u(n-n_0)');
title(['Shifted unit step sequence with n_0 = ' num2str(n0)]);
axis([n1-1 n2+1 -0.2 1.2]);
grid on;

运行结果：


可以看到，该函数实现了u(n)的位移序列u(n-n0)，并在图形上显示了该序列的形状。