gusucode.com > ​数字信号处理，包括：各种现有信号及随机信号的输入，从文件读取数据的输入 > Digital Signal Matlab ex1/UnitStepSeries.m

    axes(handles.axes1);
Xaxis=str2num(get(handles.EditX,'String'));
Yaxis=str2num(get(handles.EditY,'String'));
n=[-Xaxis:Xaxis];
[x,y]=u(n);
global Signal;
Signal=y;
%subplot(2,2,1);
stem(x,y,'.k');
axis([-Xaxis,Xaxis,-Yaxis,Yaxis]);
title('单位阶跃序列')